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听力原文:M: Hello, Alice. What was the film like? W: Awful. It was a complete waste of time. M: Why? What was it about? W: It was about a married couple. They had to live with the wife's mother, because they didn't have enough money to buy a house of their own. M: A lot of young poeple have to do that. W: Yes, but the husband had to work overtime three times a week, so he was always tired. M: It sounds like the story of my life. W: Yes, it does doesn't it? But this man was always over-tired, and he couldn't sleep. So he used to take two sleeping pills every night. M: I take sleeping pills sometimes. W: Yes, but not two every night, right? Anyway, the strain was too much for him, He had a nervous breakdown and went to hospital. M: It sounds like a very depressing film. W: Not really. His wife was able to find a good job as an interpreter, because she could speak French fluently. After a few months' work, she had a better job than her husband. So in the end, they were able to buy a house, and he didn't have to work any more, stupid, wasn't it? M: I don't know. My wife used to speak French. I must tell her to brush it up. What are the two speakers talking about?
A.
A film.
B.
A TV program.
C.
A concert.
D.
A book.
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在所有滚动体上受力相等
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在一半滚动体上受力相等
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在某一确定数目的滚动体上受力相等
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A.
在所有滚动体上受力相等
B.
在 上 半 圈 滚动体上受力相等
C.
在 下 半 圈 滚动体上受力相等
D.
受力不相等,并且总有一个受力最大的滚动体
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【单选题】作用在轴承上的径向力在轴承滚动体之间是这样分布的:( )。
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在所有滚动体上受力相等
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在一半滚动体上受力相等
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受力不相等,并且总有一个受力最大的滚动体
【单选题】作用在轴承上的径向力在轴承滚动体之间是这样分布的。
A.
. 在所有滚动体上受力相等
B.
. 在 上 半 圈 滚动体上受力相等
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在一半滚动体上受力
B.
在所有滚动体上受力相等
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在某一确定数目的滚动体上受力相等
D.
受力不等,并且总有一个滚动体受力最大
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