Few airlines want to impose a total ban on their passengers using electronic devices because ________.

发布于 2021-02-03 17:59:32
【单选题】
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

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