从高为5m处以某一初速度竖直向下抛出一个小球,在与地面相碰后弹起,上升到高为2m处被

题型:单项选择题

问题:

从高为5m处以某一初速度竖直向下抛出一个小球,在与地面相碰后弹起,上升到高为2m处被接住,则在这段过程中()

A.小球的位移为3m,方向竖直向下,路程为7m

B.小球的位移为7m,方向竖直向上,路程为7m

C.小球的位移为3m,方向竖直向下,路程为3m

D.小球的位移为7m,方向竖直向上,路程为3m

考点:高中物理位移与路程位移与路程题库
题型:单项选择题

阅读理解。

     Sport is very interesting and  my  friend Paul likes it very much. He plays tennis with his  sister every

morning. At school, he likes P.E. class. His P.E. teacher teaches him to play sports. In the aftemoon, he

goes to the sports club in his school. He plays  basketball  and  volleyballthere. In the evening, he plays

ping-pong  with  his father.  He  watches  sports games on TV everyday,  and  he wants to be a sports

player(运动员 ).

根据短文完成句子.

1. Paul likes sports very much because it is_______________.

2. Paul and __________ often play tennis in the morning.

3. Paul plays basketball and volleyball_____________in the afternoon.

4. Paul plays ping-pong with his father_________.

5. Paul likes watching ____________on TV every day.

题型:单项选择题

超声仪的组织定征技术的作用是()。

A.可对细胞学进行分析

B.分析组织结构的声学特征的改变

C.无任何价值

D.虽影响因素较多,但结果非常准确

E.可代替心导管检查方法

题型:单项选择题

( )是政府经济职能的体现,是中央政府为实施规划目标而采取的一系列手段和对策。

A.城市规划

B.经济政策

C.货币政策

D.宏观经济

题型:单项选择题

俄国废除农奴制中,能体现“为了保护地主的利益,凡是能做到的一切都做到了。”的是[ ]

A.废除农奴制

B.废除黑奴制

C.加强中央集权

D.农奴获得自由时赎买份地

题型:单项选择题

按尺肤凹而不起者多为()。

A.热证

B.泄泻

C.瘀血

D.鼓胀

E.风水

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