When __________ know each other? Ten days ago?
A. do you
B. did you
C. do you get to
D. did you get to
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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
We ____ each other the best of luck in the exam.
A. hoped
B. wished
C. expected
D. wanted