The passage is mainly about ______. Few airlines want to impose a total ban on their passengers using electronic devices becaus

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问题 The passage is mainly about ______.
Few airlines want to impose a total ban on their passengers using electronic devices because ______.

选项 A、they don’t believe there is such a danger as radio interference
B、the harmful effect of electromagnetic interference is yet to be proved
C、most passengers refuse to take a plane which bans the use of radio and cassette players
D、they have other effective safety measures to fall back on

答案B

解析依据文章第一段第四行可推断。

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本试题收录于： GCT工程硕士（英语）题库专业硕士分类