气压式高度表的拨正值QFE和QNH分别表示：

A 场面气压，修正海平面气压

B 场面气压高度，海平面气压

C 海平面气压，场压高度

解析：

A选项是正确的

Q其实就是Question的意思。

Q-code是ICAO中应用很广泛的一种码

ICAO PANS-ABC Doc8400 罗列出了Q-code

QFE What should I set on the subscale of my altimeter so that the instrument would indicate its height above the reference elevation being used?

QNH What should I set on the subscale of my altimeter so that the instrument would indicate its elevation if my aircraft were on the ground at your station?