2. 外语
  3. The chemical composition of man’s blood is similar to_____of sea water.

The chemical composition of man’s blood is similar to_____of sea water.

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问题 The chemical composition of man’s blood is similar to_____of sea water.
选项 A、that
B、there
C、which
D、here
答案A
解析 本题需要代词能够替代前文出现的特指不可数名词短语“the chemical composition”，且其后有of短语，比较四个选项，只有A适合。
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