两个分数的分子、分母都不同,这两个分数的大小也不相同。[ ]
错误
Henry _____ be at home now because he phoned me from the factory just now.
A.mustn’t
B.isn’t able to
C.may not
D.can’t
预付收费简称:().
A.DRG
B.DRGS
C.PPS
D.PPG
E.DRGSP