2. 外语
  3. Because alcohol is a solvent, it is a component of many liquid medicines.

Because alcohol is a solvent, it is a component of many liquid medicines.

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问题 Because alcohol is a solvent, it is a component of many liquid medicines.
选项 A、basic ingredient in making medicines
B、combination of things of different qualities
C、one of the parts that make up a whole
D、substance that helps to cure certain diseases
答案C
解析 本题中，component的意思是“成分”。四个选项中，one of the parts that make up a whole的意思是“组成整体的一部分”；basic ingredient in making medicines的意思是“制药的基本成分”；combination of things of different qualities的意思是“不同性质物品的化合物”；substance that helps to care certain diseases的意思是“用于治疗某一疾病的物质”。只有C项符合题意。
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