额定电压为660/380V的三相异步电动机,其连接形式在铭牌上表示为()。
A.Y/A
B.A/Y
C.△×Y
D.△/△
参考答案:A
A VLCC (100,000 DWT+) with a 30,000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a().
A.bigger propeller
B.smaller power to weight ratio
C.smaller propeller
D.larger power to weight ratio
1930年4月,红七军进入贵州省,攻占了哪座县城?()
A.黎平
B.册亨
C.望漠
D.榕江