题目内容

词汇与结构The ____ of the glideslope signal is arranged to define a glideslope of approximately 3° above ground level.

A. centerline
B. front
C. back
D. sideline

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词汇与结构Localizer and glideslope carrier frequencies are ____ so that only one selection is required to tune both receivers.

A. seperated
B. matched
C. paired
D. mated

词汇与结构Localizer and glideslope signals are displayed on an indicator in the instrument ____. This instrument is generally called the omni-bearing indicator or nav indicator.

A. board
B. panel
C. table
D. stand

词汇与结构The pilot controls the aircraft so that the indications on the instrument remain centered on the display. This ensures the aircraft is following the ____ centreline.

A. ILS
B. IGS
C. VOR
DME

词汇与结构____ guidance, shown on the instrument by the glideslope indicator, aids the pilot in reaching the runway at the proper touchdown point.

A. Horizontal
B. Vertical
C. Parallel
D. Precision