2. 外语
  3. Water enters into a great variety of chemical reactions,______ have been mentioned in previous pages.

Water enters into a great variety of chemical reactions,______ have been mentioned in previous pages.

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问题 Water enters into a great variety of chemical reactions,______ have been mentioned in previous pages.
选项 A、a few of it
B、a few of that
C、a few of them
D、a few of which
答案D
解析
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