20、关于起飞最低标准的说法正确的是？Which of the following is true about the take-off minimum standards?
A.起飞最低标准等同于着陆最低标准。minimum take off standard is equal to minimum landing standard;
B.起飞最低标准考虑了超障高。minimum take off standard has considered the obstacle height;
C.起飞最低标准保证在单发情况下控制飞机足够的目视参考。minimum take off standard can ensure sufficient visual reference for aircraft control when one engine is inoperative.;
正确答案是C