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单选题
When ILS approaches are in progress, the controller may ask the pilot to “hold short of the ILS critical area”. This does not imply that （ ） ．
A
the runway in use is equipped with ILS
B
the ILS signals might be interfered if the airplane proceeds beyond the ILS hold lines
C
the ILS for the runway in use is out of service
D
there may be another aircraft making an ILS approach
答案解析
正确答案：C
