川大《模拟电子技术1098》17秋在线作业12题目
《模拟电子技术1098》17秋在线作业1一、单选题：
1.<img height=\\\255\\\ width=\\\576\\\ alt=\\\\\\ src=\\\http://file.open.com.cn/ItemDB/12537/d99423bd-1c34-499f-94a7-5e1750d60f62/200811121481844.GIF\\\ />A (满分:2)
A.A
B.B
C.C
D.D
2.表征场效应管放大能力的重要参数是( )。 (满分:2)
A.<IMG SRC=\\\http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20070515/ea5b4f42.JPG\\\></IMG>
B.<IMG SRC=\\\http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20070515/842a927a.JPG\\\></IMG>
C.<IMG SRC=\\\http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20070515/fb1d0670.JPG\\\></IMG>
D.<IMG SRC=\\\http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20070515/aeab09b6.JPG\\\></IMG>
3.桥式RC正弦波振荡器中的RC串并联网络的作用为（ ）。 (满分:2)
A.选频正反馈
B.选频负反馈
C.放大负反馈
D.稳幅正反馈
4.<img height=\\\240\\\ width=\\\576\\\ alt=\\\\\\ src=\\\http://file.open.com.cn/ItemDB/12537/be939efd-c94a-457e-9e24-7d7506f36c0c/2008111214934575.GIF\\\ />A (满分:2)
A.A
B.B
C.C
D.D
5.PN结加反向偏置时，空间电荷区（） <br /><br /> (满分:2)
A.变宽
B.变窄
C.不变
D.不确定
6.<img height=\\\255\\\ width=\\\576\\\ alt=\\\\\\ src=\\\http://file.open.com.cn/ItemDB/12537/ed3e10d3-bfe8-44bb-a3b5-1725b644a8e4/200811121475291.GIF\\\ />A (满分:2)
A.A
B.B
C.C
D.D
7.1、\\tBJT的两个PN结均正偏或均反偏时，所对应的状态是（） (满分:2)
A.截止或放大
B.截止或饱和
C.饱和或截止
D.已损坏
8.用万用表判别处于放大状态的某个BJT的类型（NPN管或PNP管）与三个电极时，最方便的方法是测出（）。 (满分:2)
A.各级间电阻
B.各级对地电位
C.各级电流
D.各级间电压
9.某放大电路在负载开路时的输出电压为6V，当接入2 kΩ负载后输出电压降为4V，这表明该放大电路的输出电阻为（ ） (满分:2)
A.10 kΩ
B.2 kΩ
C.1 kΩ
D.0.5 kΩ
10.<IMG SRC=\\\http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20070326/b34f0e36.JPG\\\></IMG> (满分:2)
A.D1导通，D2导通
B.D1导通，D2截止
C.D1截止，D2导通
D.D1截止，D2截止
二、多选题：
11.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>差动放大电路（）</span> (满分:5)
A.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>能抑制零漂</span>
B.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>提高输入电阻 </span>
C.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>减小输出电阻</span>
D.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>增益与输出方式有关</span>
12.在基本放大电路中，三极管通常不处于（ ）工作状态。 (满分:5)
A.甲类
B.乙类
C.甲乙类
D.丙类
13.桥式RC正弦波振荡器中的RC串并联网络的作用为（） (满分:5)
A.选频
B.正反馈
C.负反馈
D.放大
14.对于共集电极放大电路的特点，正确的结论是（） (满分:5)
A.输入电阻高
B.输出电阻小
C.电压放大倍数小于1，且接近等于1
D.电流放大倍数小于1
15.在考虑放大电路的频率失真时，若vi为正弦波，关于vo错误的是（) (满分:5)
A.可能产生相位失真
B.可能产生幅度失真和相位失真
C.产生非线性失真
D.不会产生线性失真
16.与甲类功率放大方式比较，甲乙类互补对称功率放大的优点是\\n（） (满分:5)
A.效率高
B.克服交越失真
C.克服截止失真
D.不需大电容
三、判断题：
17.在功率放大电路中，输出功率最大时，功放管的功耗也最大。（ ） (满分:5)
A.错误
B.正确
18.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>集成运放的<span lang=\\\EN-US\\\>K<sub>CMR</sub></span>越大，集成运放对温漂的抑制作用越好。</span> (满分:5)
A.错误
B.正确
19.当输入信号为失真的正弦波时，加入负反馈后能使失真得到改善。 (满分:5)
A.错误
B.正确
20.电流负反馈可以稳定输出电流，电压反馈可以稳定输出电压。 ( ) (满分:5)
A.错误
B.正确
21.共射极放大电路既有电压放大作用，又有电流放大作用。 (满分:5)
A.错误
B.正确
22.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; LETTER-SPACING: 0.5pt; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\><span style=\\\mso-spacerun: yes\\\> <img height=\\\86\\\ width=\\\576\\\ alt=\\\\\\ src=\\\http://file.open.com.cn/ItemDB/12537/e715663d-e0ac-44f5-9794-059e3b1c32eb/20081112141428839.GIF\\\ />A</span></span> (满分:5)
A.错误
B.正确
23.电压放大器无功率放大作用。 (满分:5)
A.错误
B.正确
24.串联反馈可以提高输入电阻，并联反馈可以减小输入电阻。 (满分:5)
A.错误
B.正确
25.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>放大电路在高频信号作用下放大倍数下降的原因<v:line id=\\\_x0000_s1026\\\ style=\\\Z-INDEX: 1; LEFT: 0px; POSITION: absolute; TEXT-ALIGN: left; mso-position-horizontal-relative: text; mso-position-vertical-relative: text\\\ strokecolor=\\\white\\\ to=\\\315pt,0\\\ from=\\\4in,0\\\></v:line>是晶体管极间电容和分布电容的影响。</span> (满分:5)
A.错误
B.正确
26.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>两个单极放大电路空载的放大倍数均为—</span><span lang=\\\EN-US\\\ style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体\\\>50</span><span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>，将他们构成两级阻容耦合放大器后，总的放大倍数为</span><span lang=\\\EN-US\\\ style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体\\\>2500</span><span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>。</span><span lang=\\\EN-US\\\ style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\><span style=\\\mso-spacerun: yes\\\></span></span> (满分:5)
A.错误
B.正确
《模拟电子技术1098》17秋在线作业2
一、单选题：
1.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'\\\>差分式放大电路由双端输入变为单端输入时，其空载差模电压增益</span> (满分:2)
A.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'\\\>增加一倍</span>
B.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'\\\>不变</span>
C.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'\\\>减少一半</span><span lang=\\\EN-US\\\ style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\><span style=\\\mso-spacerun: yes\\\> </span></span>
D.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>减少一倍</span>
2.<IMG SRC=\\\http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20070326/b34f0e36.JPG\\\></IMG> (满分:2)
A.D1导通，D2导通
B.D1导通，D2截止
C.D1截止，D2导通
D.D1截止，D2截止
3.稳压二极管通常工作在()才能够稳定电压。 (满分:2)
A.反向击穿区
B.截止区
C.死区
D.导通区
4.1、\\tBJT的两个PN结均正偏或均反偏时，所对应的状态是（） (满分:2)
A.截止或放大
B.截止或饱和
C.饱和或截止
D.已损坏
5.<img height=\\\255\\\ width=\\\576\\\ alt=\\\\\\ src=\\\http://file.open.com.cn/ItemDB/12537/d99423bd-1c34-499f-94a7-5e1750d60f62/200811121481844.GIF\\\ />A (满分:2)
A.A
B.B
C.C
D.D
6.桥式RC正弦波振荡器中的RC串并联网络的作用为（ ）。 (满分:2)
A.选频正反馈
B.选频负反馈
C.放大负反馈
D.稳幅正反馈
7.<img height=\\\240\\\ width=\\\576\\\ alt=\\\\\\ src=\\\http://file.open.com.cn/ItemDB/12537/be939efd-c94a-457e-9e24-7d7506f36c0c/2008111214934575.GIF\\\ />A (满分:2)
A.A
B.B
C.C
D.D
8.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>某传感器产生的是电压信号（几乎不提供电流），经过放大后希望输出电压与信号成正比，放大电路应是（</span><span lang=\\\EN-US\\\ style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体\\\> </span><span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>）电路。</span> (满分:2)
A.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>电流串联负反馈</span>
B.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>电压串联负反馈</span><span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\> </span>
C.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>电流并联负反馈</span>
D.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>电压并联负反馈</span>
9.PN结加反向偏置时，空间电荷区（） <br /><br /> (满分:2)
A.变宽
B.变窄
C.不变
D.不确定
10.某放大电路在负载开路时的输出电压为6V，当接入2 kΩ负载后输出电压降为4V，这表明该放大电路的输出电阻为（ ） (满分:2)
A.10 kΩ
B.2 kΩ
C.1 kΩ
D.0.5 kΩ
二、多选题：
11.与甲类功率放大方式比较，甲乙类互补对称功率放大的优点是\\n（） (满分:5)
A.效率高
B.克服交越失真
C.克服截止失真
D.不需大电容
12.放大电路的三种组态中，只能放大电压或放大电流的是（ ）。 (满分:5)
A.共射组态
B.共集组态
C.共基组态
D.0
13.对于共集电极放大电路的特点，正确的结论是（） (满分:5)
A.输入电阻高
B.输出电阻小
C.电压放大倍数小于1，且接近等于1
D.电流放大倍数小于1
14.差动放大电路（ ） (满分:5)
A.能抑制零漂
B.提高输入电阻
C.减小输出电阻
D.增益与输出方式有关
15.在信号的运算中，往往把运算放大器视为理想的放大器，在运算过程中，利用其两个重要的特性，它们是（ ） (满分:5)
A.抑制共模信号
B.放大差模信号
C.虚短
D.虚断
16.在考虑放大电路的频率失真时，若vi为正弦波，关于vo错误的是（) (满分:5)
A.可能产生相位失真
B.可能产生幅度失真和相位失真
C.产生非线性失真
D.不会产生线性失真
三、判断题：
17.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>反相比例运算电路引入的是负反馈，同相比例运算电路引入的是正反馈。</span> (满分:5)
A.错误
B.正确
18.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>集成运放的<span lang=\\\EN-US\\\>K<sub>CMR</sub></span>越大，集成运放对温漂的抑制作用越好。</span> (满分:5)
A.错误
B.正确
19.电压放大器无功率放大作用。 (满分:5)
A.错误
B.正确
20.当输入信号为失真的正弦波时，加入负反馈后能使失真得到改善。 (满分:5)
A.错误
B.正确
21.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>互补输出级采用射极输出方式是为了使电压放大倍数高。</span> (满分:5)
A.错误
B.正确
22.在桥式整流电路中接入电容滤波后，输出直流电压较未加电容时变小。 (满分:5)
A.错误
B.正确
23.在功率放大电路中，输出功率最大时，功放管的功耗也最大。（ ） (满分:5)
A.错误
B.正确
24.串联反馈可以提高输入电阻，并联反馈可以减小输入电阻。 (满分:5)
A.错误
B.正确
25.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>两个单极放大电路空载的放大倍数均为—</span><span lang=\\\EN-US\\\ style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体\\\>50</span><span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>，将他们构成两级阻容耦合放大器后，总的放大倍数为</span><span lang=\\\EN-US\\\ style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体\\\>2500</span><span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>。</span><span lang=\\\EN-US\\\ style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\><span style=\\\mso-spacerun: yes\\\></span></span> (满分:5)
A.错误
B.正确
26.<span style=\\\FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA\\\>集成运放电路采用直接耦合方式是因为可使温漂变小。</span> (满分:5)
A.错误
B.正确
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