试题与答案

在中性点接地的电力系统中,以两相接地的短路故障最多,约占全部故障的90%。()

题型:判断题

题目:

在中性点接地的电力系统中,以两相接地的短路故障最多,约占全部故障的90%。()

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析: 投标文件的撤回是指投标人收回全部投标文件,或放弃投标,或以新的投标文件重新投标。投标文件的修改是指投标人对投标文件中遗漏和不足部分进行增补,对已有的内容进行修订。

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题型:选择题

如图,相距为d的两水平线L1和L2分别是水平向里的匀强磁场的边界,磁场的磁感应强度为B,正方形线框abcd边长为L(L<d)、质量为m。将线框在磁场上方高h处由静止开始释放,当ab边进入磁场时速度为V0,cd边刚穿出磁场时速度也为V0。从ab边刚进入磁场到cd边刚穿出磁场的整个过程中(      )

A.线框一直都有感应电流

B.线框有一阶段的加速度为g

C.线框产生的热量为mg(d+h+L)

D.线框做过减速运动

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题型:阅读理解

The American book Who Moved My Cheese has been a bestseller all over the world. It teaches people how to face changes in their lives. Now its author Spence Johnson has written a book just for teens. The book tells us that when facing change in our lives, like a new school or new friends, don't be afraid. Instead, use this change to make a better life. The book gives an example of a change at school. A school is changing from having two terms to three terms because there are too many students.

Several teens are talking about this. Most of them are unhappy and worried. But Chris is not. He laughs and tells a story about two mice, two “little people” and some cheese.

The four are in a maze looking for the cheese. Here, cheese means something important in life, like moving to a new class or getting into college. But they find the cheese is gone. The mice realize that they can’t change what has happened and have to find more cheese. This means finding different dreams. The little people, however, can’t do this. They are afraid of change so they find no cheese.

After Chris finishes the story, the friends understand one thing: to get more cheese, move in a new direction quickly. His friends understand how this can be used in the changes all teens face, such as doing well at school or having good relationships or just feeling good about yourself.

小题1:The book Who Moved My Cheese is __________.

A.written all over the world

B.read across the world

C.sold only in America

D.loved only by teens小题2:What does the text mainly discuss?

A.Never change in our life.

B.Change whenever you like .

C.Change with the changes.

D.Pay attention to the changes,小题3: The underline word “four”(paragraph 3) refers to __________.

A.mice and little people

B.students

C.cheese

D.readers小题4: In our lives, we should learn from __________.

A.mice

B.little people

C.Chris

D.Spence Johnson

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