题目内容

基底压力的分布形态与什么因素有关？

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刚性基础基底压力的分布形态有哪几种？

The airline only allows two pieces of luggage. You ___ pack too much or you will have to take it out at the airport!

A. had better not
B. better not
C.had not better

A gentleman ___ his hat and hold it in his hand when a lady enters the elevator.

A. Should put on
B. should to take off
C. should take off

The reason why he ___ to the meeting is that he is a senator.

A. ought
B. ought go
C. ought to go