,What does the author say about the black box?<br>A . It ensures the normal functioning of an airplane<br>B . The idea for its design comes from a comic book<br>C . Its ability to ward off disasters is incredible.<br>D , It is an inseparable device on an airplane

,What does the author say about the black box?
A . It ensures the normal functioning of an airplane
B . The idea for its design comes from a comic book
C . Its ability to ward off disasters is incredible.
D , It is an inseparable device on an airplane

出自：伊犁师范-基础英语1

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