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As a music teacher for twenty-seven years, I have always kno
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—how was Jenny's birthday party last night —Oh we had a most
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He would idle about for the whole summer vacation and then d
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含有同种果蔬但浓度不同的A、B两种饮料,A种饮料重40千克,B种饮料重60千克.现从这两种饮料中各倒出一部分,且倒出部分
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