题目内容

All mode A,C, and S transponders include an “ident” button, which ______ a special “thirteen” bit on the mode A reply known as Ident.

A. operates
B. stimulates
C. cultivates
D. activates

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When radar equipment ______ the Ident bit, it results in the aircraft’s blip “blossoming” on the radar scope.

A. receives
B. accepts
C. gets
D. turn

The controller can ______ the aircraft amongst others by requesting the ident function from the pilot.

A. navigate
B. navigation
C. locate
D. location

N型半导体的多数载流子是( )

A. 自由电子
B. 空穴
C. 正离子
D. 负离子

稳压管正常工作在（）。

A. 正偏导通状态
B. 反偏截止状态
C. 反向击穿状态
D. 放大状态