下列说法中正确的是[ ] A．只有自由落体运动是匀变速运动

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问题选择题

下列说法中正确的是[ ]

A．只有自由落体运动是匀变速运动

B．竖直上抛运动不是匀变速运动

C．平抛运动不是匀变速运动

D．自由落体、竖直上抛运动、平抛运动都是匀变速运动

答案

答案：D

补全对话，情景问答

补全对话。

A: Good afternoon, Miller! l

B：I'm drawing a horse.

A:A horse? Can you let me have a look?

B: 2 . Here you are.

A: Oh, the horse looks very nice. Do you often draw in your free time?

B: 3 .

A: Do you like drawing?

B: Yes. I like drawing very much.

A: 4 ?

B: Because it's very interesting. And my art teacher is very kind to me.

A: 5 ?

B: I have an art lesson once a week.

单项选择题

隧道养护作业机械应配备（）。

A、反光标志

B、倒车警报器

C、频闪灯

D、示宽灯