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最佳答案：①pretty ugly 相当难看②look over与oversee look over只是一般的检查,而oversee则强调一种程序化的检查③That is
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最佳答案：On the contrary, many students treasure the communication with teachers after cl
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最佳答案：In contrary to disease A in which a person experiences abdominal pain before fev
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最佳答案：|a|=-a.a=-b.(a+b)^2 ≥0cd=0.ab ≠0