2. 外语
  3. A、Because some people don’t think they need the sun to get vitamin D. B、Because it’s an example of an evolutionary compromise. C

A、Because some people don’t think they need the sun to get vitamin D. B、Because it’s an example of an evolutionary compromise. C

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问题
选项 A、Because some people don’t think they need the sun to get vitamin D.
B、Because it’s an example of an evolutionary compromise.
C、Because someone has got too much sun.
D、Because some people think they are healthy enough.
答案B
解析 对话中主持人指出一般在冬天胆固醇不会达到阳光充足时的水平后，接着说但这种情况要视具体情况而定，而Sharon回答说这是一种“进化妥协现象”(evolutionary compromise)。因此选择B。选项A，B，C在听力原文中未提及，可排除。
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