题目内容

在特定穴中，公孙穴是，又是。

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三阴交穴是与，__经脉相交会的穴。

Normally the term _ refers to incidents in which the pilot forgets to extend the landing gear, while refers to incidents where a mechanical malfunction prevents the pilot from extending the landing gear.

A. gear-up landing, belly landing
B. belly landing, gear-up landing
C. forced landing, ditching
D. ditching, forced landing

A voice message system on some aircraft may give a clear _____ warning indication: “GEAR NOT DOWN”.

A. verbal
B. visual
C. valid
D. video

When the pilot forgets to extend the landing gear, he needs to conduct a _____ landing.

A. flapless
B. gear-up
C. hard
D. crosswind