Scientists got the result by examining blood from the dog owners and their dogs.

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问题 Scientists got the result by examining blood from the dog owners and their dogs.

选项 A、正确
B、错误

答案B

解析 原文说:The scientists examined hair from the dog owners and their dogs.也就是说,科学家是通过主人和狗的毛发(而不是血液)进行研究的,因此,是错误的。
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