[单选题]The ( ) installation is such that the course beams are narrower and sidelobes are low. A.A、LOC-1F B.B、LOC-2F C.C、GS-1F D.D、GS-2F
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[单选题]( )You are proceeding on a dangerous course A.You changed your course B.Your present course is dangerous C.You must cross the traffic lane D.You remain your course and speed