题干
选择。
① Let's go home! ____ A. It's 9 o'clock．
② Where is Amy? ____ B. Yes．I do．
③ What time is it now? ____ C. OK．
④ Do you like music class? ____ D. She is in the art room．
答案(点此获取答案解析）
C,D,A,B
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、
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中，分式的个数有（ ）