According to the passage, compared to 3G mobile phones, the second-generation ph

游客2023-10-09 38

问题 According to the passage, compared to 3G mobile phones, the second-generation phones ______. [br] The passage mainly talks about ______.

选项 A、the impact of mobile phone signals on health
B、the negative impact of current signals on health
C、the long-term effects of mobile phones on health
D、the possible causes of the impact of mobile phones

答案 A

解析

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