题目内容

The teacher encouraged the boy to learn to draw and told him that he was one-of-a-kind.

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If you don’t like the plan, you can drop out.

Do you believe him? I’m sure he knows more than he’s letting on.

常见的再生制动模式不包括？

A. 紧急制动
B. 正常制动
C. 长下坡制动
D. 上坡制动

紧急制动加速度的临界值是多少？

A. 1m/s2
B. 2m/s2
C. 3m/s2
D. 4m/s2