常用的数据传输网络的通信传输方式包括总线通信传输、无线通信传输、。
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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 _______