—What about watching the movie Big Fish tomorrow?
—Oh, I it already.
A:watch
B:have watched
C:will watch
D:am watching
在下列所示的电路图中,能用电压表正确测出灯L1两端电压的是( )
A.棉纱织布
B.粮食酿酒
C.指南针应用
D.____