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最佳答案:分三类情况讨论,一是选甲不选乙,有二是选乙不选甲,有三是既不选甲也不选乙,有所以共有
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最佳答案:I still remember the day when I first came to the college. Being a boy of 17, I
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最佳答案:第一段When I first came to America, I thought I was in university English majors, h