2. 外语
  3. A、They want to find out the relationship between environment and biology. B、They want to see what characteristics distinguish on

A、They want to find out the relationship between environment and biology. B、They want to see what characteristics distinguish on

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问题  
Scientists understand how twins are born. Now though, they are trying to explain how being half of a biological pair influences a twin’s identity. They want to know why many identical twins make similar choices even when they don’t live near each othe
选项 A、They want to find out the relationship between environment and biology.
B、They want to see what characteristics distinguish one from the other.
C、They want to understand how twins communicate when far apart.
D、They want to know whether twins can feel each other’s pain.
答案A
解析 短文提到，科学家研究了多对生活环境迥异的双胞胎，其目的是了解生活环境和生物因素的关系，并提出了今后研究的许多课题，故A为答案。
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大学英语四级

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