重60N的人站在升降机内的台秤上，台秤示数为480N，则升降机的可

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问题选择题

重60N的人站在升降机内的台秤上，台秤示数为480N，则升降机的可能正在

A．匀速下降

B．加速下降

C．减速上升

D．减速下降

答案

根据题意，我们可得，人处于失重状态，即加速度方向向下，所以升降机可能在加速下降也可能是减速上升。BC正确。

阅读理解

阅读理解，将正确答案的序号写在题前括号里。

It's Sunday morning. There are some Young Pioneers in the park. They are having a good time. Look! Some

boys are playing football on the grass. Some girls are singing and dancing under the big tree. Oh, where is Peter?

He's sitting by the lake. What's he doing? He's reading a book. Where is Linda? She's over there. She's flying a

kite. How happy they are!

1. There are some in the park. [ ]

A. Young Pioneers

B. boys

C. girls

2. Are they having a good time? [ ]

A. Yes, it is.

B. Yes, they are.

C. No, they aren't.

3. Peter is . [ ]

A. playing football

B. singing

C. reading a book

4. Linda is .[ ]

A. dancing

B. flying a kite

C. sitting

选择题

2010年4月13日青海玉树地震发生后，在外访问的国家 * * 胡 * * 提前回国领导抗震救灾工作，国务院 * * 温 * * 15日晚乘专机抵达青海玉树。党和政府领导人民抗震救灾的事实说明（）

①中 * * 党坚持立党为公，执政为民 ②党和政府坚持全心全意为人民服务

③关键时期党和政府必须共同履行国家职能 ④大灾面前才能真正树立政府的权威

A．①②

B．③④

C．②③④

D．①②③