选择题:—Come in, please. Make yourself at home. —I’m glad

题目内容:
—Come in, please. Make yourself at home. —I’m glad you like it.
A、 Thanks. You have a nice place here.
B、 Oh, this picture is so beautiful!
C、 Thanks. What nice food you’ve prepared!
D、 OK. Let me look around your new house.
参考答案:

求位移的单位荷载法是由什么推导出来的?A.互等定理B.虚力原理C.叠加原理D.虚位移原理

求位移的单位荷载法是由什么推导出来的?A.互等定理B.虚力原理C.叠加原理D.虚位移原理

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