三相负载有功功率的表达式为()
A、P=UIcosφ;
B、P=Scosφ;
C、P=UIcosφ;
D、cosφ=P/S
参考答案:C
It is required that employees in the company have to have a good__________ of English.
A.request
B.view
C.design
D.command
治疗行痹取血海、膈俞的目的是()
A.调合营卫
B.清血分热
C.活血养血
D.振奋阳气
E.祛风解表