外界大气温度是指自由空气的静态温度，可从飞机上的温度指示或地面气象源获得，并根据仪器误差 和压缩性效应进行调整。
A.Outside air temperature is the free air static temperature, obtained either from temperature indications onboard on ground meteorological sources,; adjusted for instrument error and compressibility effects. B.Outside air temperature is the free air static temperature, acquired either from inflight temperature indications or ground geological sources, modified by instrument error and compression effects. C.Outside air temperature is the free air static temperature, derived either from infight temperature indicators or ground methodological sources, modulating instrument error and compressibility effects.正确答案A
