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  3. The scientists carried out the research by using blood samples and saliva sample

The scientists carried out the research by using blood samples and saliva sample

游客2025-01-24  2
问题 The scientists carried out the research by using blood samples and saliva samples.
选项 A、正确
B、错误
答案 A
解析 原文说：They completed human genome examinations using blood samples from the UK Biobank and saliva samples from the U．S．-based ancestry company 23andMe．也就是说，科研人员采用了英国人的血液样本和美国人的唾液样本，因此，是正确的。
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