题目内容

Doctor Volkow was astonished because ______。

提问人：ylm发布时间：2020-10-05

A、her research has shed light on her understanding of cell phone

B、she found that cell phone exposure is harmful to human brain

C、she found that using a cell phone for about 50 minutes could influence or change brain activity

D、human brain is not responsive to electromagnetic radiation

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Doctor Volkow was astonished because ______。

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