A.45° B.35° C.25° D.15°
A.轉(zhuǎn)子功率因數(shù)低 B.轉(zhuǎn)子轉(zhuǎn)速低 C.轉(zhuǎn)子電流小 D.轉(zhuǎn)子電壓小
A.特別重大事故 B.重大事故 C.人身傷亡事故 D.一般事故