The radiation amount of a mobile phone for two half-hour periods per day is equal to to a

发布时间：2020-08-17 03:57:34

The radiation amount of a mobile phone for two half-hour periods per day is equal to      to an X-ray for ten seconds.
A. expose
B. exposing
C. exposed
D. being exposed

网友回答

A. expose
B. exposing
C. exposed
(答案→)D. being exposed
解析：考察动名词用法。固定搭配be equal to…与…平等；其中的to是介词，后面要接动名词形式。教育：每天两个半小时的手机的辐射量相当于被X光线照射10秒。根据句意说明使用动名词的被动形式。故D正确。
以上问题属网友观点，不代表本站立场，仅供参考！