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【单选题】
若要设计一个脉冲序列为1101001110的序列脉冲发生器,用 个触发器。A.
2
B.
3
C.
4
D.
10
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举一反三
【单选题】A photon having 40 keV scatters from a free electron at rest. What is the maximum energy that the electron can obtain? ( )
A.
5.41 eV
B.
4.32 eV
C.
7.95 eV
D.
1.73 eV
【简答题】(B) Studying makes you tired? How to deal with the worries and relax yourself? Here is some advice which may add happiness to your life. 1 Rest at weekends: Weekends are time for a rest. After a week'...
【单选题】--- you having supper at this time yesterday? ---No, I was .
A.
Are; having a rest
B.
Were; read a book
C.
Are; watching TV
D.
Were; singing
【单选题】听力原文：M: Would you like to stop for a rest? W: Oh, no. We are almost at the top of the hill. Q: What are they doing now? (8)
A.
Having a rest.
B.
Looking for something.
C.
Climbing a hill.
D.
Going down a hill.
【简答题】An ant ( 蚂蚁 ) fell in a river. She tried her best to reach the bank ( 岸 ), but she couldn‟t move at all. A bird threw her a piece of wood out of pity ( 怜悯 ). With it the ant reached the bank again. Wh...
【单选题】At weekends I prefer ______ at home ____ a good rest.
A.
staying, to having
B.
staying, having
C.
to stay, to have
D.
to stay, to having
【简答题】My sister’s ten-year-old son came for a visit at the weekend one hot July. And I had to make him stay inside by joining him in a . An hour later, I suggested that we relax a while. He slipped out ...
【简答题】Passage 1 Having a part-time job is an important part of growing up for American agers. It can teach them important skills that will be useful for the rest of their lives. And many agers find ...
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