The usual control for the left pack makes sure that it supplies air at a temperature. That gives the necessary cooling for the fight compartment通常控制左组件，以确保它提供的空气温度。这为驾驶舱提供 了必要的冷却
A.The usual control for the left pack ensures that it supplies air at a temperature. The temperature gives the occasional cooling for the flight compartment B.The normal control for the left pack makes sure that it supplies air. The cooling provides the necessary temperature for the flight compartment. C.The usual control for the left pack assures that the temperature of the supplied air will provide the control cabin with the needed cooling.正确答案B
