2. 外语
  3. In chemical works there are many waste materials, most of which ______ (在物定情况下可以转化为有用的东西)

In chemical works there are many waste materials, most of which ______ (在物定情况下可以转化为有用的东西)

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问题 In chemical works there are many waste materials, most of which ______ (在物定情况下可以转化为有用的东西)
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答案can be turned into useful things under certain conditions
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大学英语四级

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