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<p>。。。。。。。。。。。</p>
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<p class="MsoNormal" style="TEXT-ALIGN: center" align="center"><b style="mso-bidi-font-weight: normal"><span style="FONT-SIZE: 18pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">弱电试题</span></b><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 18pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></b></p>
<p class="MsoNormal"><b style="mso-bidi-font-weight: normal"><span lang="EN-US" style="FONT-SIZE: 18pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></b><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">（考试时间：</span><span lang="EN-US" style="FONT-SIZE: 14pt">90</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">分钟</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">总分</span><span lang="EN-US" style="FONT-SIZE: 14pt">100</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">分）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">姓名：</span><u><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></u><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">得分：</span><u><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></u><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">一、填空题（每空</span><span lang="EN-US" style="FONT-SIZE: 14pt">1</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">分，共</span><span lang="EN-US" style="FONT-SIZE: 14pt">30</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">分）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="TEXT-INDENT: 7pt; mso-char-indent-count: .5"><span class="style41"><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: windowtext">1</span></span><span class="style41"><span style="FONT-SIZE: 14pt; COLOR: windowtext; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、安全防范的三种基本防范手段：</span></span><span class="style41"><u><span style="FONT-SIZE: 14pt; COLOR: windowtext"> </span></u></span><span class="style41"><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">人防</span></u></span><span class="style41"><u><span style="FONT-SIZE: 14pt; COLOR: windowtext"> </span></u></span><span class="style41"><span style="FONT-SIZE: 14pt; COLOR: windowtext; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、</span></span><span class="style41"><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600"> </span></u></span><span class="style41"><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">物防</span></u></span><span class="style41"><u><span style="FONT-SIZE: 14pt; COLOR: windowtext"> </span></u></span><span class="style41"><span style="FONT-SIZE: 14pt; COLOR: windowtext; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">和</span></span><span class="style41"><u><span style="FONT-SIZE: 14pt; COLOR: windowtext"> </span></u></span><span class="style41"><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">技防</span></u></span><span class="style41"><u><span style="FONT-SIZE: 14pt; COLOR: windowtext"> </span></u></span><span class="style41"><span style="FONT-SIZE: 14pt; COLOR: windowtext; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">。</span></span><span class="style41"><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: windowtext"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="TEXT-INDENT: 7pt; mso-char-indent-count: .5"><span class="style41"><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: windowtext">2</span></span><span class="style41"><span style="FONT-SIZE: 14pt; COLOR: windowtext; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、</span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">安全防范的三个基本要素是：</span><u><span style="FONT-SIZE: 14pt"> </span></u><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">探测</span></u><u><span style="FONT-SIZE: 14pt"> </span></u><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、</span><u><span style="FONT-SIZE: 14pt"> </span></u><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">延迟</span></u><u><span style="FONT-SIZE: 14pt"> </span></u><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">与</span><u><span style="FONT-SIZE: 14pt"> </span></u><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">反应</span></u><u><span style="FONT-SIZE: 14pt"> </span></u><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">。</span></p>
<p class="MsoNormal" style="TEXT-INDENT: 7pt; mso-char-indent-count: .5"><span lang="EN-US" style="FONT-SIZE: 14pt">3</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、<strong><span style="FONT-WEIGHT: normal; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">电视监控系统基本结构由</span></strong>：</span><span style="FONT-SIZE: 14pt"> <u><span style="COLOR: #ff6600"><span style="mso-spacerun: yes">&nbsp;</span></span></u></span><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">摄像</span></u><span style="FONT-SIZE: 14pt"> </span><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">传输</span></u><span style="FONT-SIZE: 14pt"> </span><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">控制</span></u><span style="FONT-SIZE: 14pt"> </span><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">显示</span></u><u><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></span></u><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;</span><u><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></u><span style="mso-spacerun: yes">&nbsp;</span><u><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></u><span style="mso-spacerun: yes">&nbsp;</span><u><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></u></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">组成。</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 7.05pt; mso-para-margin-left: .67gd"><span lang="EN-US" style="FONT-SIZE: 14pt">4</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、贴片电阻</span><span lang="EN-US" style="FONT-SIZE: 14pt">104</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">的阻值是</span><u><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: #ff6600">100000</span></u><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">欧姆，四色环电阻中标有棕黑黄银色环的电阻器的阻值是</span><u><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: #ff6600">100000</span></u><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">欧姆、标有黄紫橙金色环的电阻的阻值是</span><u><span style="FONT-SIZE: 14pt"> <span style="mso-spacerun: yes">&nbsp;</span><span lang="EN-US" style="COLOR: #ff6600">47000</span></span></u><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">欧姆。</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="TEXT-INDENT: 7pt; mso-char-indent-count: .5"><span lang="EN-US" style="FONT-SIZE: 14pt">5</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">计算机硬件由<u><span lang="EN-US" style="COLOR: #ff6600">CPU</span></u></span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</span><span style="FONT-SIZE: 13.5pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><u><span style="FONT-SIZE: 12pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">内部存贮器</span></u><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><u><span style="FONT-SIZE: 12pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">外部存贮器</span></u><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><u><span style="FONT-SIZE: 12pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">输入输出（</span></u><span style="FONT-SIZE: 13.5pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><u><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">I/O</span></u><span lang="EN-US" style="FONT-SIZE: 13.5pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> </span><u><span style="FONT-SIZE: 12pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）设备</span></u><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">等组成。<span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 7.05pt; mso-para-margin-left: .67gd"><span lang="EN-US" style="FONT-SIZE: 14pt">6</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">可执行文件（<span lang="EN-US"> .com </span>和<span lang="EN-US"> .exe </span>）在内存中执行的工作流程为：（<span lang="EN-US"> 1 </span>）由 <u><span lang="EN-US" style="COLOR: #ff6600">command.com</span></u><span lang="EN-US"> </span>文件调用<span lang="EN-US"> dos </span>的<span lang="EN-US"> exec </span>功能；（<span lang="EN-US"> 2 </span>）在内存建立 <span lang="EN-US">100 H </span>字节的 <u><span style="COLOR: #ff6600">程序段前缀</span></u> ；（<span lang="EN-US"> 3 </span>）把可执行文件加载 内存 ，对<span lang="EN-US"> .com </span>文件则 <u><span style="COLOR: #ff6600">直接执行</span></u> ，对于<span lang="EN-US"> .exe </span>文件则<span lang="EN-US"> &nbsp; </span><u><span style="COLOR: #ff6600">重定后执行</span></u>。<span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 7.05pt; mso-para-margin-left: .67gd"><span lang="EN-US" style="FONT-SIZE: 14pt">7</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">数据库系统的主要特点是实现数据 <u><span style="COLOR: #ff6600">共享</span></u> 、减少数据 <u><span style="COLOR: #ff6600">冗余</span></u> 、采用特定的数据 <u><span style="COLOR: #ff6600">模型</span></u> 、具有较高的数据 <u><span style="COLOR: #ff6600">独立性</span></u> 、具有统一的数据控制功能。<span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 7.05pt; mso-para-margin-left: .67gd"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">8</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">门禁系统由</span><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">读卡器</span></u><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">、</span><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">控制器</span></u><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">、</span><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">电磁锁</span></u><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">、</span><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">识别卡</span></u><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">和</span><u><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">计算机</span></u><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">组成。<o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">二、选择题（每题1.5分，共15分）<o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 7.05pt; mso-para-margin-left: .67gd"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">1</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、喷淋系统中，设置启动喷淋泵的动作值是（ <span lang="EN-US" style="COLOR: #ff6600">A </span>）。<span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">A</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、压力开关下限值<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>B</span>、压力开关上限值<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span>C</span>、压力开关上限值及下限值<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span>D</span>、都不是<span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 11pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align="left"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">2</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">用于光线不足地区及夜间无法安装照明设备的地区，在仅监视景物的位置或移时，可选（ </span><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">B</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN"> ）.<o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 11pt; TEXT-INDENT: 21pt; TEXT-ALIGN: left; mso-char-indent-count: 1.5; mso-para-margin-left: 1.05gd; mso-layout-grid-align: none" align="left"><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">A 、彩色摄像<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>B 、黑白摄像机 </span><b><span style="FONT-SIZE: 14pt; FONT-FAMILY: System; mso-font-kerning: 0pt; mso-bidi-font-family: System; mso-ansi-language: ZH-CN"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;</span>3</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、光电耦合器的作用是（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">A</span><span lang="EN-US"> </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）。</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="TEXT-INDENT: 28.5pt"><span lang="EN-US" style="FONT-SIZE: 14pt">A</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、隔离</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>B</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、放大</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>C</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、驱动</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>D</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、缓冲</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 11pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align="left"><span lang="EN-US" style="FONT-SIZE: 14pt">4</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">镜头的光圈直径(D)与镜头焦距(f)之比；数值愈小，光圈愈大，透过的光线（ </span><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">A</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN"> ）。<o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 11pt; TEXT-INDENT: 21pt; TEXT-ALIGN: left; mso-char-indent-count: 1.5; mso-para-margin-left: 1.05gd; mso-layout-grid-align: none" align="left"><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">A、 愈多<span style="mso-spacerun: yes">&nbsp;&nbsp; </span>B、 愈少<span style="mso-spacerun: yes">&nbsp;&nbsp; </span>C 、没变化 </span><b><span style="FONT-SIZE: 14pt; FONT-FAMILY: System; mso-font-kerning: 0pt; mso-bidi-font-family: System; mso-ansi-language: ZH-CN"><o:p></o:p></span></b></p>
<p class="MsoNormal" style="TEXT-INDENT: 7pt; mso-char-indent-count: .5"><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;</span>5</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、万用表用完后，转换开关转到（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">B </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）位置。</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="TEXT-INDENT: 7pt; mso-char-indent-count: .5"><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>A</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、直流电流档</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp; </span>B</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、高电压档</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp; </span>C</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、低电压档</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp; </span>D</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、欧姆档</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">6</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、生活水泵使用可控硅变频调速，其中变频器的输出频率越高，则电机水泵的转速（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">A </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）。</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp; </span>A</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、越大</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp; </span>B</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、越小</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp; </span>C</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、不变</span><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp; </span>D</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、无法确定</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 11pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align="left"><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;</span>7</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">一般报警器与中心通讯距离不能超过 ( </span><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">A</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN"> )米<o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 11pt; TEXT-INDENT: 21pt; TEXT-ALIGN: left; mso-char-indent-count: 1.5; mso-para-margin-left: 1.05gd; mso-layout-grid-align: none" align="left"><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">A、20米<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>B、200米<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>C、120米<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>D、1200米<o:p></o:p></span></p>
<p style="LINE-HEIGHT: 18.75pt"><span style="FONT-SIZE: 14pt; COLOR: black; mso-ansi-language: ZH-CN"><span style="mso-spacerun: yes">&nbsp; </span>8、</span>通态平均电压值是衡量晶闸管质量好坏的指标之一，其值（ <span style="COLOR: #ff6600"><span style="mso-spacerun: yes">&nbsp;</span><span lang="EN-US">A</span></span><span lang="EN-US"> <span style="mso-spacerun: yes">&nbsp;</span></span>）。<span lang="EN-US"> </span></p>
<p style="LINE-HEIGHT: 18.75pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp; </span>Ａ、越大越好<span lang="EN-US"> &nbsp;&nbsp;&nbsp; </span>Ｂ、越小越好<span lang="EN-US"> &nbsp;&nbsp;&nbsp; </span>Ｃ、适中为好 </p>
<p class="MsoNormal" style="MARGIN-LEFT: 11pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align="left"><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp;</span>9</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN">二进制数1101101等于十进制数的（<span style="mso-spacerun: yes">&nbsp; </span>D<span style="mso-spacerun: yes">&nbsp; </span>）<o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 11pt; TEXT-ALIGN: left; mso-layout-grid-align: none" align="left"><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>A、106<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>B、107<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>C、108<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>D、109 </span><b><span style="FONT-SIZE: 14pt; FONT-FAMILY: System; mso-font-kerning: 0pt; mso-bidi-font-family: System; mso-ansi-language: ZH-CN"><o:p></o:p></span></b></p>
<p style="LINE-HEIGHT: 18.75pt"><span lang="EN-US" style="FONT-SIZE: 14pt"><span style="mso-spacerun: yes">&nbsp; </span>10</span><span style="FONT-SIZE: 14pt">、动作二氧化碳气体灭火系统的的条件是（ <span lang="EN-US" style="COLOR: #ff6600">C</span><span lang="EN-US"> </span>）<span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="TEXT-ALIGN: left; mso-layout-grid-align: none" align="left"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span>A</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、烟感报警<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span>B</span>、温感报警<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span>C</span>、先烟感后温感报警<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span>D</span>、先温感后烟感报警</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体; mso-ansi-language: ZH-CN"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">三、判断题（每题</span><span lang="EN-US" style="FONT-SIZE: 14pt">1.5</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">分，共</span><span lang="EN-US" style="FONT-SIZE: 14pt">15</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">分）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">1</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、当单相桥式整流电路中任一整流二极管发生短路时，输出电压的数值将下降一半，电路变成半波整流电路。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">×</span><span lang="EN-US"> </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">2</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、闭环控制系统采用负反馈控制，是为了提高系统的机械特性硬度，扩大调速范围。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">√ </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">3</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、带有电容滤波的单相桥式整流电路，其输出电压的平均值取决于变压器二次电压有效值与所带负载的大小无关。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">×</span><span lang="EN-US"> </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">4</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、用示波器测量电信号时，被测信号必须通过专用探头引入示波器，不用探头就不能测量。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">×</span><span lang="EN-US"> </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">5</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、在逻辑电路中有正负逻辑之分，当用</span><span lang="EN-US" style="FONT-SIZE: 14pt">“</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">１</span><span lang="EN-US" style="FONT-SIZE: 14pt">”</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">表示高电平，</span><span lang="EN-US" style="FONT-SIZE: 14pt">“</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">０</span><span lang="EN-US" style="FONT-SIZE: 14pt">”</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">表示低电平，称为正逻辑，反之称为负逻辑。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">√</span><span lang="EN-US"> </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">6</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、二极管正向动态电阻的大小，随流过二极管电流的变化而改变，是不固定的。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">√</span><span lang="EN-US"> </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">7</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、单结晶体管的等效电路是由一个二极管和两个电阻组成的，所以选用一个适当的二极管和两个电阻正确联接后，就能用来取代单结晶体管。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">×</span><span lang="EN-US"> </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span lang="EN-US" style="FONT-SIZE: 14pt"> <br/>8 </span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、放大器的放大作用是针对变化量而言的，其放大倍数是输出信号的变化量之比。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">√</span><span lang="EN-US"> </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">9</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、闭环控制系统采用负反馈控制，是为了提高系统的机械特性硬度，扩大调速范围。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">√</span><span lang="EN-US"> </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span lang="EN-US" style="FONT-SIZE: 14pt"> <br/>10 </span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、开环系统对于负载变化引起的转速变化不能自我调节，但对其外界扰动是能自我调节的。（</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US" style="COLOR: #ff6600">× </span></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）</span><span style="FONT-SIZE: 14pt"> <span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">四、名词解释（</span><span lang="EN-US" style="FONT-SIZE: 14pt">10</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">分）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN-LEFT: 14.05pt; mso-para-margin-left: 1.34gd"><span lang="EN-US" style="FONT-SIZE: 14pt">1</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">、可控硅</span><span lang="EN-US" style="FONT-SIZE: 14pt"><br/></span><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">答：可控硅是一种新型的大功率整流元件，它与一般的硅整流元件的区别就在于整流电压可以控制，当供给整流电路的交流电压一定时，输出电压能够均匀调节</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: #ff6600"><o:p></o:p></span></p>
<p style="LINE-HEIGHT: 21pt"><span style="FONT-SIZE: 14pt">五、问答题 （每题<span lang="EN-US">15</span>分，共 <span lang="EN-US">30</span>分 ）<span lang="EN-US"><br/></span>１、在单相桥式整流电路中，如果有一个二级管短路、断路或反接，会出现什么现象？<span lang="EN-US"> <br/><span style="mso-spacerun: yes">&nbsp; </span><span style="COLOR: #ff6600"><span style="mso-spacerun: yes">&nbsp;</span></span></span><span style="COLOR: #ff6600">答：在单相桥式整流电路中，如果有一个二极管短路，将变成半波整流，另半波电源短路；如果有一个二极管断路，就会形成半波整流，如果有一个二极管反接，则电路不起整流作用，负载中无电流流过。<span lang="EN-US"> <br/></span></span><span lang="EN-US">2</span>、</span><span style="mso-bidi-font-weight: bold">通过测量什么参数可以判别在路晶体管的工作状态。（只说共射极，阻容耦合电路）。</span><span lang="EN-US"> </span></p>
<p style="LINE-HEIGHT: 21pt"><span style="COLOR: #ff6600">答：最简单的可以通过测量三极管的<span lang="EN-US"> Vce </span>值来判别，<span lang="EN-US"> <o:p></o:p></span></span></p>
<p style="LINE-HEIGHT: 21pt"><span style="COLOR: #ff6600">即：如果<span lang="EN-US"> Vce ≈ 0 </span>时，管子工作在饱和导通状态。<span lang="EN-US"> <o:p></o:p></span></span></p>
<p style="LINE-HEIGHT: 21pt"><span lang="EN-US" style="COLOR: #ff6600">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="COLOR: #ff6600">如果<span lang="EN-US"> Vbe ∠ Vce ∠ Ec </span>时，可认为工作在放大状态。<span lang="EN-US"> <o:p></o:p></span></span></p>
<p class="MsoNormal"><span lang="EN-US" style="COLOR: #ff6600">&nbsp;&nbsp;&nbsp;</span><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">如果</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: #ff6600"> Vce ≈ VEc </span><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">时，三极管工作在截止区。这里（</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: #ff6600"> Ec </span><span style="FONT-SIZE: 14pt; COLOR: #ff6600; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">为电源电压）</span><span lang="EN-US" style="FONT-SIZE: 14pt"><o:p></o:p></span></p>

顶

<p>惭愧</p>