题目内容

Spending 50 minutes with a cell phone close to your ear is enough to change brain cell activity in the part of the brain closest to the antenna(天线). But whether that causes any harm is not clear, scientists at the National Institute of Health said a

提问人：ylm发布时间：2020-10-16

A.、Cell phone use is dangerous。

B、Cell phone use causes cancer。

C、The human brain is an electromagnetic field。

D、There are about 5 billion cell phone users in the world right now。

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Spending 50 minutes with a cell phone close to your ear is enough to change brain cell activity in the part of the brain closest to the antenna(天线). But whether that causes any harm is not clear, scientists at the National Institute of Health said a

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