A:副线圈中电压表的读数为55V
B:副线圈中输出交流电的周期为
C:原线圈中电流表的读数为0.5 A
D:原线圈中的输入功率为110W
Schools should be lively places where individuals are encouraged to _____ their greatest potential.
对于工业废气中余氯的定量测定常用的化学分析法是( )
8m=____dm