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the difference between a and b是a-b还是b-a a and b is 还是are 已知某地有a、b两学校 a学校今年有若干人上学 问:这个b学有几个人想上 假设a 0 b 10 那么a and b的结果是 a and b is还是are取决于什么 a b 与a is b 的区别 如果所有的a是b 但是没有一个b是c 那么一定没有一个c是a 这句话是 a b是一个条件表达式 而a b不是 

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and in the school the abandoned school and they are in the same class in their school a new school was built there are absent from school a new school is built these days a school bus is one that a school that can educate and the school school aboard 

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