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【简答题】
阅读短文,选择正确答案。 A small man went to a cinema, bought a ticket and went in. But after two or three minutes he came out, bought a second ticket and went in again. After a few minutes, he came out again and bought a third ticket. Two or three minutes after that, he came out a third time and asked for another ticket. But the girl said to him, 'Why are you buying all these tickets? Are you waiting for friends in the cinema all the time?' 'No, I am not doing that,' answered the small man. 'But a big woman always stops me at the door and tears (撕) my ticket up.' The girl smiled and sold him another ticket. 1. One day a small man went to _____. [     ] A. a shop B. a hospital C. a post office D. a cinema 2. The small man bought _____ tickets in all. [     ] A. five B. three C. four D. six 3. The big woman _____. [     ] A. didn't let the small man in B. was the ticket collector (收票员) C. didn't like a small man at all D. was the doorkeeper (看门人) 4. The small man _____. [     ] A. enjoyed the film very much B. didn't like the film at all C. didn't see the film at all D. was very clever 5. The girl ______. [     ] A. was the ticket seller B. was the doorkeeper C. was the ticket collector D. was the small man's friend
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【简答题】双向晶闸管导通时,第一阳极与第二阳极之间的电压降约为 ___________。
【单选题】中国社会主义根本政治制度是()。
A.
人民代表大会制度
B.
中国共产党领导的多党合作和政治协商制度
C.
民族区域自治制度
D.
基层群众自治制度
【单选题】M8011的输出脉冲周期是多少?
A.
100ms
B.
10ms
C.
1ms
D.
1s
【单选题】脉冲输出周期是1S的特殊辅助继电器是( )
A.
M8012
B.
M8013
C.
M8011
D.
M8014
【多选题】C MOS运算放大器的优点是
A.
功耗低
B.
摆幅大
C.
抗静电能力强
D.
电源电压宽
E.
抗干扰能力强
F.
速度快
G.
驱动能力强
【单选题】下列 不属于 集成运算放大器优点的是:
A.
性能稳定、可靠性高
B.
寿命长
C.
体积小、重量轻
D.
耗电量大
【简答题】M8011的脉冲输出周期是[填空(1)] 。
【单选题】晶闸管导通时,管压降约为( )V。
A.
0
B.
0.3
C.
0.7
D.
1
【单选题】M8011的输出脉冲周期是( )
A.
100ms
B.
10ms
C.
1ms
D.
1s
【单选题】晶闸管导通后,本身的压降约为()V左右,称为通态平均电压。
A.
0.5
B.
0.7
C.
1
D.
3