选择题:Modern science and technology has _____ communicat

题目内容:
Modern science and technology has _____ communication between people far apart.
A、 made convenient
B、 made it convenient
C、 made it convenient for
D、 made it convenient to
参考答案:

互等定理只适用于_______体系,反力互等定理,位移互等定理都以_____定理为基础导出。

互等定理只适用于_______体系,反力互等定理,位移互等定理都以_____定理为基础导出。

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