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问题 不定项选择

如图所示，一小球从光滑圆弧轨道顶端由静止开始下滑，进入光滑水平面又压缩弹簧．在此过程中，小球重力势能和动能的最大值分别为Ep和Ek，弹簧弹性势能的最大值为Ep′，则它们之间的关系为  

[ ]

A．Ep＝Ek＝Ep′  

B．Ep>Ek>Ep′

C．Ep＝Ek＋Ep′  

D．Ep＋Ek＝Ep′ 

答案

答案：A

阅读理解

阅读理解。

                                                                       A Photo

      Look at this photo. It is a photo of Mr Green's family. Look at the woman. That's his wife. They

have two children, Henry and Helen.  Henry is a pupil.  He is interested in playing football, and he is

good at playing the flute. Helen can not walk. She is too young. She is not a pupil. They are from

America.

单词快递：wife 妻子 interest 兴趣 flute 长笛 young 年轻 America 美国

1. How many children does Mr Green have?

    He has _____ children.        

A. two                  

B. three

2. What can you call Mr. Green's wife?

    We can call her _____.

A. Miss Green                

B. Mrs Green

3. Mr Green's daughter's name is _____.

A.  Helen Green              

B. Henry Green

4. Is Henry a pupil?      

A. Yes, he is.    

B. Yes, she is.

5. Where are they from? They      

A. America      

B. China
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单项选择题 B1型题

制备水丸的关键工序为（）

A.盖面

B.制丸条

C.起模

D.制丸块

E.干燥
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