The device has a sensor that measures body temperature and changes to the heart rate called HRV.

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问题 The device has a sensor that measures body temperature and changes to the heart rate called HRV.

选项 A、正确
B、错误

答案B

解析 原文说:The device has a sensor that measures hemoglobin oxygen levels and changes to the heart rate called HRV.这里有一个术语(hemoglobin oxygen levels)可能有的同学不太熟悉,但是,文章后面提到了blood oxygen levels(血氧水平),不是体温(body temperature),因此,是错误的。
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