既能成实像、又能成虚像的镜子是( )
A:平面镜
B:凸面镜
C:凸透镜
D:凹透镜
—What does she like doing?—She doesn't like playing the trumpet __________ the piano.
抗日战争中,中国军队主动出击日军的最大规模战役是( )