题目内容

“He __________ to live in Dongguan” means that he no longer lives there.

A. uses
B. used
C. was used
D. is used

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When __________ know each other? Ten days ago?

A. do you
B. did you
C. do you get to
D. did you get to

基本体系在Δ1=1单独作用时,附加约束2中产生的约束力矩和约束力为 ( ) 。

A. k11
B. k21
C. k22

位移法方程实质上是几何条件。( )

A. 对
B. 错

The pen I ____ I ____ is on my desk, right under my nose.

A. think; lost
B. thought; had lost
C. think; had lost
D. thought; have lost

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