题目内容

短听力练习-7-17听录音，并选择正确选项

A. CES234 is maintaining at 2100m.
B. CES234 is able to cross CHat 55
CES234 is unable to cross CH before 55.
D. CES234 is able to comply with the controller’s instruction.

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短听力练习-7-18听录音，并选择正确选项

A. due conflicting traffic.
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完成起动过程所需的装置，称为发动机的启动系。

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