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新民主主义革命取得伟大胜利的标志是什么？

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词汇与结构The Instrument Landing System (ILS) is a ground-based instrument approach system which provides ____ guidance to an aircraft approaching a runway.

A. accuracy
B. precision
C. non-precision
D. inaccuracy

词汇与结构Instrument Approach Procedure charts (or approach plates) are ____ for each ILS approach.

A. published
B. revealed
C. broadcast
D. released

词汇与结构Instrument Approach Procedure charts provide pilots with the needed information to fly an ILS approach during ____ operations.

A. VFR
B. VMC
C. IMC
D. IFR

词汇与结构The needed information to fly an ILS approach includes the radio frequencies used by the ILS components or ____ and the minimum visibility requirements prescribed for the specific approach.

A. VOR
B. DME
C. NDB
D. NAVAIDs