图示结构EI为常数，用力矩分配法求得弯矩MbA是（）kN·m。
A.2
B.-2
C.8
D.-8
参考答案：B
解析：考查力矩分配法的计算方法
---Do you mind my opening the window to let the fresh air in?
---__________. I also would like to breathe in some fresh air.
A．Never mind
B．Not at all
C．That’s all right
D．You’d better not
What’s the matter ________ the kitchen fan.
A．of
B．with
C．for
D．to
