768、确保襟翼和缝翼是收上的

　make sure that the flaps and the elevators are extended

　make sure that the flaps and the slats are retracted

　make sure that the slats and the ailerons are retracted

正确答案：B

解析：

解析:注释: elevator 升降舵; aileron 副翼; slat 缝翼; flap 襟翼。extend 伸出;retract 收回

720、 Make sure that you remove all tools and equipment.

719、Make sure that the indication on the gauge agrees with the quantity that is in the tank.

718、 Make sure that the cabin pressure stays constant.

717、lf test result fail, the repair extent should be depended on the troubles

716、 Keep tools away and pick up debris near the engine

715、Keep all the＇ parts that are serviceable and discard those that are broken.

714、Increase the pressure slowly ( not more than one turn each minute)

713、In the alternative, the acronym CAP may be used

712、If you do not safety the door it is possible that strong winds will cause damage to the structure. 如果你不锁好门，强风可能会对结构造成破坏。

711、If you cannot engage the rod and the piston, the length of the new rod is possibly incorrect