四六级考试

【单选题】 What can we infer from the passage
A．We have enough written record of our ancestors to prove the identity.
B．Many American slaves got to know who their ancestors were though DNA.
C．An adopted child generally lacks enough information to prove his identity.
D．Molecular genealogy can be used to prove a relationship between individuals.

网考网参考答案：D
网考网解析：
推断题。这篇文章的中心就是讲述宗谱学利用遗传标记所提供的独有识别特征将人连成家谱，用以证明人们之间的关系，故选D)。 查看试题解析出处>>