The radiation amount of a mobile phone for two half-hour periods per day is equal to ______ to an X-ray for ten seconds.


  1. A.
    expose
  2. B.
    exposing
  3. C.
    exposed
  4. D.
    being exposed
D
試題分析:考察動(dòng)名詞用法。固定搭配be equal to…與…平等;其中的to是介詞,后面要接動(dòng)名詞形式。教育:每天兩個(gè)半小時(shí)的手機(jī)的輻射量相當(dāng)于被X光線照射10秒。根據(jù)句意說明使用動(dòng)名詞的被動(dòng)形式。故D正確。
考點(diǎn):考察動(dòng)名詞用法
點(diǎn)評(píng):本題考察的動(dòng)名詞的用法,介詞后面要接動(dòng)名詞形式,要根據(jù)上下文的語境來使用主動(dòng)或者被動(dòng)形式。另外要注意動(dòng)名詞表示的是經(jīng)常性習(xí)慣性的行為。
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