2. 外语
  3. People in a large area any possess the same DNA thread because______. The possible research of family trees is based on the fac

People in a large area any possess the same DNA thread because______. The possible research of family trees is based on the fac

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问题 People in a large area any possess the same DNA thread because______.
The possible research of family trees is based on the fact that______.
选项 A、genetics has achieved a breakthrough for family trees
B、genetic information contained in DNA can be revealed now
C、each individual carries a unique record of his relation to others
D、we can use DNA to prove how distant an individual is to a family
答案C
解析 推断题。由第一段第二、三句可知，根据遗传标记提供的独有的识别特征(unique identification)可以把人们连成家谱。也即是说，之所以能对家谱进行研究，是因为遗传标记的独有特征可以用来判断一个人的基因身份以及与他人之间的关系，故选C。
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大学英语四级

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