产品成本计算的基本方法与辅助方法的区别关键在于是否是计算产品实际成本必不可少的方法。
A. 对
B. 错
Lesson two Listen and fill in the blanks with missing callsigns and numbers-1______, departure runway ______; wind ______ degrees ______knots QNH_______ temperature ______ dew point _____ RVR _________meters
Lesson Two listen and fill in the blanks with misssing callsigns and numbers-2 _______ start-up approved at ______ correction ________
Listen and fill in the blanks with missing callsigns and numbers-3 ______ turn right heading ______ descend to ______feet QNH_______