2. 外语
  3. People in a large area may possess the same DNA thread because ______ . The Molecular Genealogy Research Group is building a da

People in a large area may possess the same DNA thread because ______ . The Molecular Genealogy Research Group is building a da

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问题 People in a large area may possess the same DNA thread because ______ .
The Molecular Genealogy Research Group is building a database for the purpose of ______ .
选项 A、offering assistance in working out genealogy-related problems
B、solving many issues without relying on traditional written records
C、providing a pedigree chart of at least four generations in the world
D、confirming the assumption that all individuals are of the same origin
答案A
解析 细节题。  题干问的是建数据库的目的，解题关键在第二段中：“help in solving many issues regarding genealogies that could not be done by relying only (仅靠…不能解决与宗谱相关的诸多问题)”。A意为“解决宗谱有关的问题时提供帮助”，是正确答案。其余选项均不正确。B意为“无须依赖传统文字资料解决许多问题”；C意为“提供世界至少四代人的家谱”；D意为“核实所有个体都有同样祖先的假设”。
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