在线名词解释大全 - Reading - 详细

TextA--4.WhydidtheFederalAviationAuthorityrequiretheblackboxesbepaintedorangeoryellow?

A
To distinguish them from the colour of the plane.
B
To caution people to handle them with care.
C
To make them easily identifiable.
D
To conform to international standards.
正确答案:
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