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问题 选择题

如图所示，放在水平地面上的物体A、B高度相等，A对地面的压力小于B对地面的压力。若在两物体上部沿水平方向切去一定的厚度，使剩余部分的质量相等，则剩余部分的厚度hA′、hB′及剩余部分对地面压强pA′、pB′的关系是

A．hA′＞hB′，pA′＜pB′

B．hA′＞hB′，pA′＞pB′

C．hA′＜hB′，pA′＞pB′

D．hA′＜hB′，pA′＜pB′

答案

答案：A

题目分析：由题意知：物体A、B高度相等，A对地面的压力小于B对地面的压力，则A的质量小于B的质量，若在两物体上部沿水平方向切去一定的厚度，使剩余部分的质量相等，故剩余部分的厚度应是hA′＞hB′，剩余部分对水平面的压力相等，由图知A的受力面积大，故压强小，本题正确选项是A。

阅读理解

Mr. Evans lived in a city. He was a bus driver in a company three years ago. He drove well and the people in the company all liked him. But a terrible accident changed（改变）his life. One spring he drove his bus with twenty- four workers to visit a place of interest. They had a good time there. But on their way back home, their bus was hit by a truck（卡车）because the truck driver was drunk（醉）. Four workers were killed and half of the rest of the workers got badly injured. Mr. Evans was also injured. After he came out of hospital, he left the company and became a traffic policeman. He tried his best to stop the drivers from breaking the traffic riles. He worked hard and was strict with the drivers, especially the drivers that were drunk. So they were afraid of him. But the people liked him, for he was a good policeman.

小题1:How did the accident happen?

A. The truck hit the bus.      B. The bus hit the truck.  C. The bus hit a big tree.

小题2:How many people were injured in the accident?

A. Four.                      B. Ten               C. Eleven.

小题3:What did Mr. Evans do after he left hospital?

A. He was a bus driver.

B. He was a policeman.

C. He was a truck driver.
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简答题

温 * * * * 在中国政府网与网友进行在线交流，在交流中他说：“我一直认为群众有权知道政府在想什么、做什么，并且对政府的政策提出批评意见，政府也需要问政于民，问计于民。”

（1） * * 的话说明我国公民享有什么政治权利？

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（2）政府为什么要问政于民、问计于民？

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