单项选择题

Questions 17—20 are based on the following passage about the tests of airliner before it goes into service You now have 20 seconds to read Questions 17—20. What would happen if a small part of the plane were cracked

A．The plane would not go forward.
B．The plane would explode.
C．The plane would fall down.
D．The plane would fly slowly.

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单项选择题

单项选择题

Questions 17—20 are based on the following passage about the tests of airliner before it goes into service You now have 20 seconds to read Questions 17—20. What would happen if a small part of the plane were cracked 您的浏览器不支持 audio 元素。