电能表内轻载调整装置所产生的补偿力矩,通常补偿累载时因()引起的负误差。
A.电压变化
B.摩擦力矩及电流铁芯磁化曲线的非线性
C.温度变化
D.潜动力矩
参考答案:B
I’m not a little tired today after giving the room a thorough cleaning and I have never had_________today.
A.as tiring a day as
B.as a tiring day
C.tiring as a day as
D.day as tiring as
小方坯连铸矫直一般采用()类型。
A.一点矫直
B.两点矫直
C.三点矫直
D.多点矫直