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• 英语不可不看的记忆单词经典句子

  wft6699 发表于 2008-02-29 19:27:27

  11. Acids are chemical compounds that, in water solution, have a sharp taste, a corrosive action on metals, and the ability to turn certain blue vegetable dyes red. 11.酸是一种化合物，它在溶于水时具...

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