题目内容

三视图分别为主视图、俯视图、右视图。()

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It is imperative that the state-owned enterprise ______ more funds to improve its outdated

A. has to
B. attracts
C. attract
D. shall attract

键的功能是用于联接轴与轴上零件，实现周向固定而传递力矩。()

已知某一电阻为2MQ，通过的电流为2mA，求电阻两端的电压？

带有灭弧罩的刀开关可以切断较小的负荷电流。()