简述电力系统调整电压的主要方式?
参考答案:
(1)改变发电机端电压调压。
(2)改变变压器变比调压。
(3)设置并联补偿装置调压。
(4)设置串联补偿装置调压。
You drive your car so fast It's very dangerous.
A.wouldn't
B.shouldn't
C.couldn't
D.mightn't
花类药材在加工贮藏时要尽量防止
A.走油B.潮解C.风化D.变软E.变色