题目内容

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

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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

---Can I join your club, Dad?-You can when you ____ a bit older.

A. get
B. will get
C. are getting
D. will have got