关于力矩有以下几种说法： (1) 对某个定轴转动刚体而言，内力矩不会改变刚体的角加速度． (2) 一对作用力和反作用力对同一轴的力矩之和必为零． (3) 质量相等，形状和大小不同的两个刚体，在相同力矩的作用下，它们的运动状态一定相同．对上述说法下述判断正确的是( )．

A.只有(2)是正确的

B.(1)、(2)是正确的

C.(2)、(3)是正确的

D.(1)、(2)、(3)都是正确的

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更多“关于力矩有以下几种说法：（1) 对某个定轴转动刚体而言，内…”相关的问题

第1题

— How did Mr. Jones get to the cinema？—______.A. At 10 o’clock.B. With Mrs. Jones.C.

— How did Mr. Jones get to the cinema？

—______.

A. At 10 o’clock.

B. With Mrs. Jones.

C. By car.

D. To the Grand Theater.

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第2题

What did Mr. Jones ask the students to do？Mr. Jones asked the students to write ______ in

What did Mr. Jones ask the students to do？

Mr. Jones asked the students to write ______ in the class.

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第3题

听力原文： Mr. and Mrs. Jones very seldom go out in the evening, but last Saturday, Mrs. Jo

nes said to her husband, "There's a good film at the cinema tonight. Can we go and see it？" Mr. Jones was quite happy about it, so they went, and both of them enjoyed the film.

They came out of the cinema at 11 o'clock, got into their car and began driving home. It was quite dark. Then Mrs. Jones said. "Look, Bill. A woman is running along the road very fast, and a man's running after her. Can you see them？"

Mr. Jones said. "Yes, I can." He drove the car slowly, near the woman and said to her, "Can we help you？"

"No, thank you," the woman said, but she did not stop running. "My husband and I always run home after the cinema, and the last one washes the dishes at home!"

Where did the Mr. and Mrs. Jones go last Saturday？

(8)

A．They went to the theater.

B．They staved at home talking.

C．They went to the cinema.

D．They washed the dishes at home.

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第4题

How do I get to the cinema？ _____________A.It’s very farB.Yes, there is a cinema near her

How do I get to the cinema？ _____________

A.It’s very far

B.Yes, there is a cinema near here