视在功率
参考答案:
视在功率表示交流电气设备的容量,其值等于电压有效值和电流有效值的乘积。单位为伏安或千伏安。
_________, I always feel I want a few more days.
A.However long is a vacation
B.However long a vacation is
C.However is a vacation long
D.However a vacation is long
以下哪些是计数型的质量特性()
A.含氮量
B.破损数
C.废品数
D.速度
E.疵点数