A basic VFR runway is marked by _______ .
A.the runway number and threshold markings
B.the runway number and a dashed white centerline
C.the threshold markings and touchdown zone markings
D.both B and C
正确答案是B
A basic VFR runway is marked by _______ .
A.the runway number and threshold markings
B.the runway number and a dashed white centerline
C.the threshold markings and touchdown zone markings
D.both B and C
正确答案是B