问题 单项选择题

等直杆AB的转动刚度(劲度系数)SAB()。

A. 与B端支承条件及杆件刚度都有关

B.只与B端支承条件有关

C.与A、B两端的支承条件都有关

D.只与A端的支承条件有关

答案

参考答案:A

解析:

等直杆的转动刚度取决于杆件的线刚度和远端的支承条件。因此正确答案A。

阅读理解

Mr. King is a tall and strong man. He teaches P.E. in a middle school. He has a long beard (胡子)and takes care of it.

It was Sunday yesterday. There was a big football match of the year on the playground in the centre of the city. Mr. King likes the games very much and of course he was going to watch it. With his friends’ help he got a ticket a few days ago. After breakfast he hurried to the bus stop, but a lot of people were waiting there. A bus came. There were lots of people on it and it was difficult for them to put their feet. He had to grip(抓住)the back of the chair. At the next stop a boy got on the bus. He was short and couldn’t grip anything. Suddenly the bus stopped and the boy was likely to fall off. He looked around and saw Mr. King’s beard and gripped it. The man found it at once and called out,“Go off(松开)my beard, boy!”

“Are you going to get off, sir?”asked the boy.            

小题1:Mr. King is a _________.

A.player

B.runner

C.teacher

D.driver小题2:Mr. King was going to watch the match because _________.

A.he teaches P.E. in a middle school

B.he likes football very much

C.he got a ticket

D.he didn’t go to work yesterday小题3:It was difficult for Mr. King to stand because _________.

A.he had drunk too much

B.the bus was too small

C.he got on the bus too late

D.it was very crowded(拥挤的)on the bus小题4:The boy gripped Mr. King’s beard because __________.

A.he was afraid to fall again

B.he wanted to make the man angry

C.he hoped the man to find a seat for him

D.he hoped the man to get off soon小题5:Mr. King was afraid __________, so he shouted at him.

A.the boy would pull him down

B.the boy would hurt his beard

C.the boy could be hurt again

D.the boy would borrow his ticket

判断题