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(单选题) 1: <p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">电路如图3.4所示,R</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">F</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">引入的反馈为( )。</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><img alt="" width="206" height="161" src="http://file.open.com.cn/ItemDB/126894/2042401f-3a57-4baf-8e50-58b76a17746a/20141225125740103.jpg" /></span></p><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">A</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 并联电压负反馈 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">B</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 串联电压负反馈 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">C</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 并联电流负反馈 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">D</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 串联电流负反馈 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><!--EndFragment--></p><!--EndFragment--></span>
A: A
B: B
C: C
D: D
正确资料: A
(单选题) 2: <p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">逻辑电路如图7.1所示,当A=“0”,B=“1”时, 脉冲来到后 触发器( )。</span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p><img alt="" width="419" height="137" src="http://file.open.com.cn/ItemDB/126894/7c8a7db9-e7f3-4f0c-a794-9d4f12f3be07/2014122511466398.jpg" /></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">A</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 具有计数功能 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">B</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 保持原状态 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">C</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 置“0” </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">D</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 置“1” </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><!--EndFragment--></p><!--EndFragment--></span>
A: A
B: B
C: C
D: D
正确资料: D
(单选题) 3: <p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">逻辑电路如图7.5所示,输入为X,Y,同它功能相同的是( )。</span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p><img alt="" width="468" height="217" src="http://file.open.com.cn/ItemDB/126894/2531308a-82dc-4782-904d-e3b3b214b188/20141225115028597.jpg" /></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">A</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 可控RS触发器 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">B</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: JK触发器 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">C</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 基本RS触发器 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">D</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: T触发器 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><!--EndFragment--></p><!--EndFragment--></span>
A: A
B: B
C: C
D: D
正确资料: B
(单选题) 4: <p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">电路如图2.3所示,晶体管β=50,U</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">BE</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">=0.6V,R</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">B</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">=72kΩ,R</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">C</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">=1.5kW,U</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">CC</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">=9V,当R</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">W</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">=0时,晶体管处于临界饱和状态,正常工作时静态集电极电流I</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">CQ</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">应等于3mA,此时应把R</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">W</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">调整为( )。</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><img alt="" width="217" height="221" src="http://file.open.com.cn/ItemDB/126894/66dc061d-cac5-4465-ac2d-b84e4929497b/20141225124156155.jpg" /></span></p><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">A</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 100kΩ</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">B</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 72kΩW</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">C</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 68kΩ</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">D</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 86kΩ</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><!--EndFragment--></p><!--EndFragment--></span>
A: A
B: B
C: C
D: D
正确资料: C
(单选题) 5: <p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">逻辑电路如图7.3所示,A=“1”时, 脉冲来到后D触发器( )。</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><img alt="" width="244" height="141" src="http://file.open.com.cn/ItemDB/126894/7971d2ba-fccf-4476-aac5-fc38f5373577/20141225114755137.jpg" /></span></p><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">A</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 具有计数器功能 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">B</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 置“1” </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">C</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 置“0” </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">D</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 具有保持功能 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><!--EndFragment--></p><!--EndFragment--></span>
A: A
B: B
C: C
D: D
正确资料: A
(单选题) 6: <p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">分析时序逻辑电路的状态表,判定它是( )。</span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p><img alt="" width="177" height="226" src="http://file.open.com.cn/ItemDB/126894/aeab7ae8-bb42-47c1-a17f-f4fe4e10529b/20141225114937876.jpg" /></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">A</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 加法计数器 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">B</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 减法计数器 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">C</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 移位寄存器 </span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><!--EndFragment--></p><!--EndFragment--></span>
A: A
B: B
C: C
正确资料: B
(单选题) 7: <p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">LC振荡电路如图4.1所示,集电极输出正弦U</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">ce</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">电压与放大电路的正弦输入电压U</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">be</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">之间的相位差应为( )。</span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p><img alt="" width="280" height="252" src="http://file.open.com.cn/ItemDB/126894/1eacdebb-8372-48a1-be8c-02f8c18835b6/20141225112313571.jpg" /></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span></span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)"><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">A</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 0</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">0</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">°</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">B</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 90</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">0</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">°</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><span style="FONT-FAMILY: '宋体'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">C</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">: 180</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 9pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">0</span><span style="FONT-FAMILY: 'Helvetica Neue'; BACKGROUND: rgb(245,245,245); COLOR: rgb(51,51,51); FONT-SIZE: 10.5pt; mso-spacerun: 'yes'; mso-shading: rgb(245,245,245)">°</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-spacerun: 'yes'"><o:p></o:p></span></p><p style="LINE-HEIGHT: 15pt; MARGIN-TOP: 0pt; MARGIN-BOTTOM: 15pt" class="p15"><!--EndFragment--></p><!--EndFragment--></span>
A: A
B: B
C: C
正确资料: C
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