问题 问答题

管子OA绕O轴旋转,φ=ωt,而ω=常量,管内有一颗弹子M沿管轴线以匀速度u运动,t=0时,M与O点重合。试求M的速度和加速度。

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One day Mr. and Mrs. Black were driving to a party . Mr. Black drove the car very fast. “Please don’t drive so fast.” Mrs Black asked his husband to drive more slowly .”If you drive so fast , maybe we’ll have some trouble.”“Oh , no , Don’t be worried , my dear . ”said Mr. Black with a smile .“You know I’m good at driving . You won’t be in danger . And there is little time . If I don’t drive fast , we’ll be late for the party.”

A few minutes later , his wife , Mrs. Black , said to him,“If you don’t slow down ,We’ll be in hospital.”

Just at this moment a car came out of a side road and crossed in front of their car . Mr. Black stopped their car quickly . It nearly hit that car: “Oh , dear , I’m sorry for that . You are right , my dear,”said Mr Black . “I’ll never drive fast later . Now let me drive slowly . ”Then car drove very slowly to the party . Of course they were very late for the party.

小题1:Mr. and Mrs. Black were driving to ________ one day.

A.a meeting

B.their home

C.a party

D.work小题2:What did Mrs. Black ask her husband to do?      

A.To stop the car

B.To drive more slowly

C.To drive to a hospital

D.To drive fast小题3:Mr. Black drove so fast , because___________ .

A.he was good at driving

B.he was very happy

C.he was in danger

D.he didn’t want to be late for the party.小题4:What happened to them a few minute later ?       

A.Their car hit another car

B.their car nearly hit another car

C.Their car was broken

D.Something was wrong with their car小题5:At last Mr. Black drove their car ________  to the party

A.faster

B.slow

C.very slowly

D.happily

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