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问题 选择题

如下图所示，下列有关物体受力情况的分析错误的是： [ ]

A.静止在水平桌面上的课本

B.正在空中飞的足球

C.在水中下沉的石块

D.在斜坡上静止的小车

答案

答案：C

完形填空

An old man has spent all his life in a small village which is far from the city. One day, someone told him some interesting things about the city. He was so amazed at it that he decided to visit it. Everything was new and strange to him. The old man got excited and visited a lot of interesting places. Then he went into a large tall building and saw a lift. He didn’t know what it was used for. As he was watching it, an old woman got into the lift and the door closed behind her. After a few minutes, the door opened and a very beautiful young girl came out. The old man was very surprised. “What an interesting little room!” he said to himself, “Terrific, it can change an old woman into a young girl. I will be here with my wife next time.”

Fill in each blank according to the passage. Only one word for each blank.

From the passage, we know that the old man went to the city for the小题1: __________ time. He was very excited and surprised at what he saw. He didn’t know what the lift 小题2:__________. One day, he saw that an old woman 小题3:__________ the lift, then after a while a very beautiful girl came out, he decided to 小题4: __________ his wife here and 小题5: __________ her beautiful and young the next time.
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多项选择题

绝热结构的保护层，因其所用材料和施工方法不同可分为（）。

A．涂抹式保护层

B．金属保护层

C．软木保护层

D．毡、布类保护层
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