题目内容

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 _____

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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____

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小麦上常见的蚜虫有哪几种？

A. 麦二叉蚜
B. 玉米蚜
C. 麦无网长管蚜
D. 小米蚜
E. 麦长管蚜