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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】Tips for the Solo Traveler When it comes to traveling, sometimes taking a journey alone can be great. Traveling solo allows for a time of introspection (内省), relaxation and self-discovery, when you ca...
A.
picking a bilingual dictionary no matter where you go
B.
making copies of your passport and health insurance
C.
bringing cash and a credit card with you
D.
taking something for fun, a book, a journal, a map, etc.