当某一个发动机驱动发电机系统不工作时，该任务提供准备飞机飞行的维护步骤 A: This task gives the maintenance steps which prepare the airplane for flight with one of the engine driven generator systems inoperative. B: This task generate the maintenance steps which prepare the airplane for flight with one of the engine driven generator systems inoperative. C: This task gives the maintenance method which prepare the airplane for flight with one of the engine driven generator systems inoperative.