题目内容

Lesson 4 900 句填空-2 Sorry for ———— the frequency due ———— jammed

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Lesson 4 900 句填空-3 ________, we made the wrong ______

Lesson 4 900 句填空-4 SELCAL CODE _______ , request _______

Lesson 4 900 句填空-5 CPDLC ________, request to revert to(恢复) ________

设备中的文件属性中有drw,其中d代表什么含义?

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