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单选题
611.A/C on ground and engines shutdown,what are the conditions to erase the CVR recordings?
A
Press the CVR ERASE pushbutton for 10 seconds.
B
Press the GND CTL pushbutton,make sure that parking brake is applied and press the CVR ERASE pushbutton for 2 seconds.
C
Start at least one engine and press on the GND CTL pushbutton for 2 seconds.
答案解析
正确答案：B
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