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【单选题】
The marker beacon of the instrument landing system is use to provide ____ information.
A.
Predetermined glide slope
B.
Runway centerline
C.
Distance from the airport
D.
Flying altitude
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参考解析：
刷刷题刷刷变学霸
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【单选题】韧性材料应变硬化后卸载再加载直至破坏，请判断以下结论哪一个是正确的？
A.
屈服应力提高，弹性模量降低
B.
屈服应力提高，韧性降低
C.
屈服应力不变，弹性模量不变
D.
屈服应力不变，韧性不变
【多选题】Corresponding auxiliary landing measures could use during landing process of airplane are: ____.
A.
Open the drag parachutes
B.
Open the air brake
C.
Using arrester hook
D.
Using thrust reverser