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RJ45接口最常用的排线顺序是。

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RS-232接口最常用的DB9针脚定义是:2为发送,3为接收,5为地,又称“”信号。

Lesson two fill in the blanks （只填数字或字母，没有空格） 1. PIL: __ Control stand request departure informationCTL: departure runway , surface wind degrees kts, QNH temperature _dewpoint _____

Lesson Two--listen and fill in the blanks with missing callsigns, numbers and letters-2 PIL: __ Control _ _ miles northeast of heading _ _CTL: _ descend to _ and contact Approach _____

Lesson Two--listen and fill in the blanks with missing callsigns, numbers and letters-3 PIL: Departure Boeing heavy, climbingCTL: Boeing continue climb to and contact____