题目内容

London the financial capital of the world.

A. used to being
B. used to
C. used to be
D. used to been

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Because of the Olympic Games .

A. there has been a lot of new building
B. a lot of new building has been planned
C. a lot of new building was completed
D. there was a lot of new building

A motorway is a.

A. street
B. road
C. avenue
D. high street

A. She didn’t want to ________ .

A. take it off
B. turn it off
C. get on
D. talk about it

单位()函数信号的拉氏变换式(1/s^2 )。

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