航空器第一次接触着陆道面的那一点。

航空器第一次接触着陆道面的那一点。
A、Thepointatwhichanaircraftfirsttouchthesurfaceofrunway.
B、Thepointatwhichanaircraftfirsttouchdownthesurfaceofrunway.
C、Thefixatwhichanaircraftfirsttouchdownthesurfaceofrunway.
D、Thefixatwhichanaircraftfirsttouchthesurfaceofrunway.
正确答案：B