10、在到达FAF__，飞行机组应确认系统处于进近模式? The flight crews should ensure APP

10、在到达FAF__，飞行机组应确认系统处于进近模式? The flight crews should ensure APP mode active before ___ NM of FAF.

A.之前2NM内 2NM;

B.之前5NM内 5NM;

C.之前10NM内 10NM;

正确答案是A