A portion of flight specially devoted to accomplishing such things as takeoff, climb, cruise,descent or landing. The above sentence menas "飞行阶段:即飞行中负有一定任务(如起飞、爬升、巡航、下降或 着陆)的部份。"
A.1;正确答案A
A portion of flight specially devoted to accomplishing such things as takeoff, climb, cruise,descent or landing. The above sentence menas "飞行阶段:即飞行中负有一定任务(如起飞、爬升、巡航、下降或 着陆)的部份。"
A.1;正确答案A