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【单选题】
下列各描述的对象不能构成集合的是 ( )A.
数学书本中较难的习题,
B.
所有正三角形
C.
高一(3)班周一所有的课程
D.
全体无理数
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【简答题】举一个例子说明系列广告策略的含义
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【简答题】阅读理解。 I am a student in Grade One in a middle school in Beijing. My name is Hong Kong. Susan is my pen pal. She is twelve. She is in Grade Seven in a middle school in the USA. My English t eacher sa...
【简答题】阅读理解。 Daming, Betty and I are good friends. We are in the same (相同的) grade. They are in Class One, and I am in Class Two. We get up at seven o'clock and go to school. They have English at ten o'clock ...
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