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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】某张音乐合辑中包含9首钢琴曲和若干首小提琴独奏曲，在随机播放时听到的第一首是钢琴曲的可能性为60%，那么钢琴曲的数量比小提琴独奏曲的数量( )。
A.
多3首
B.
多6首
C.
少3首
D.
少6首
【单选题】One of the most exciting features of the Digital Divide Network website is the ability for every DDN member to have a personal blog(网络日志). Blogs contain journal entries written by the author, who’’s r...
A.
To discuss the impact of blogs on our society.
B.
To promote a new bogging tool.
C.
To introduce several kinds of blogging tool.
D.
To instruct how to write one’’s personal blog.