单项选择题
A.RM和MP3 B.AU和VOC C.AVI和MOV D.MP1和MP2
A.Arial Sound Recorder B.Winamp3 C.Winrar D.Amazing Slow Downers
A.NetAnts B.QQTOm-Skype C.豪杰超级解霸 D.Winrar
A.AVI B.MPEG C.RM D.FLC
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