第13题:[单选题]To reverse thrust, which is true: A. select reverse thrust in flight can increase R/D B. maximum reverse can be selected until the aircraft stops C. maximum reverse should not be used below 70 kt. 参考答案:C
第14题: [单项选择]肝主疏泄最基本的生理功能是 A. 调畅全身气机 B. 调节精神情志 C. 促进消化吸收 D. 维持气血运行 参考答案:A