______ in a seemingly endless war, the general was forced to evalutate the situation again.
A、Since the loss of 50 000 soldiers
B、Because of 50 000 soldiers having lost
C、Having lost over 50 000 soldiers
D、50 000 soldiers were lost

按承压方式分，压力容器可以分为内压容器和外压容器，若某内压容器设计压力为12兆帕，则该压力容器为（）。 A.低...

单项选择题按承压方式分，压力容器可以分为内压容器和外压容器，若某内压容器设计压力为12兆帕，则该压力容器为（）。

( )A.B.C.D.

单项选择题( ) A. B. C. D.

SPWM逆变电路的单极性控制和双极性控制有何区别？

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