中国本位币的最小规格是()
A、1分
B、1角
C、1元
D、10元
参考答案:C
In fact, there is _____ thing as a free lunch in the world.
A.no such
B.no a
C.not such
D.no such a
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0.01s
C.原线圈中电流表的读数为0.5A
D.原线圈中的输入功率为110W