题目内容
作定轴转动的刚体，体内任一点的法向加速度大小与该点的转动半径（ ）
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一动点在作圆周运动，则有（）
某瞬时刚体上各点的速度矢量都相等，而各点的加速度矢量不相等，因此该刚体不是作平移。
刚体作平移时，刚体内所有各点的轨迹一定是直线。
二、Part B：用方框内所给的A.B.C.D.E五个句子完成以下对话.Nurse: Good morning. Dr. Li’s office.Bruce: (1) __________. I’d like to make an appointment.Nurse: (2) __________Bruce: I have a sore throat.Nurse: (3) __________Bruce: About two days.Nurse: I see. Do you cough?Bruce: Yes, I cough now and then. I am afraid I get a cold.Nurse: Well, Dr. Li is free at 9 tomorrow morning. (4) __________Bruce: 9 o’clock tomorrow morning. It’s fine.Nurse: Ok. (5) __________Bruce: Thank you. See you.A: How long have you felt this way?B: See you tomorrow.C:Will it be ok for you?D:Good morning! My name is Bruce.E:What’s wrong with you?
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