题目内容

词汇与结构An ILS consists of ____ guidance (Localizer) and vertical guidance (Glideslope or Glide Path) to aircraft approaching a runway.

A. lateral
B. horizontal
C. longitudinal
D. level

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词汇与结构Aircraft guidance is provided by the ILS receivers in the aircraft by performing a ____ depth comparison.

A. adjustment
B. modification
C. modulation
D. rectification

词汇与结构A localizer (LOC) antenna array is normally ______ beyond the departure end of the runway and generally consists of several pairs of directional antennas.

A. adjusted
B. supported
C. located
D. equipped

词汇与结构A localizer (LOC) antenna array generally consists of several pairs of ____ antennas.

A. precision
B. directional
C. non-directional
D. non-precision

词汇与结构Each ILS antenna ____ a narrow beam, one slightly to the left of the runway centerline, the other to the right.

A. transmits
B. sends
C. transfers
D. delivers