飞行员发现前方的云有如下特征：云体庞大，垂直发展极盛，象高大山峰，云顶呈白色纤维结构，
并扩展成铁砧状。这种云应是＿＿

如果两个压力控制器均失效，两个外流活门将进入（ ）方式。If both pressure controllers fail, both outflow valves will revert to（ ）.

飞机上装有两个座舱压力控制器，如果一个控制器失效，该系统将自动转换至另一个控制器。如果自动转换失效，（ ）。这样就能接通该有裕度的备用的控制器。The airplane is equipped with dual Cabin Pressure Controllers. If a cabin pressure controller fails, the system will automatically switch over to the other controller. If automatic switch-over fails,（ ）. This will enable the redundant controller.

当飞机接地后（ ）分钟，座舱压力控制器将自动转换。（ ）minutes after the airplane has touched down, automatic cabin pressure controller switch-over will occur.

厕所和厨房通风是由排气风扇提供。该风扇要接通( )就会工作。Lavatory and galley ventilation is provided by exhaust fans. The fans run whenever ( ) is available.

如果货舱温度超过( )，ACSC 就会给加热器断电，同时发送一个信号至数字计算机组件，并在EICAS主页面上显示AFT CARGO OVHT(后货舱过热)警戒信息。If the temperature in the aft cargo compartment exceed ( ), the ACSC removes power from the heater and transmits a signal to the DCUs to display an AFT CARGO OVHT caution message on the EICAS primary page.

在 COND AIR（调节空气）位，两个关断活门打开，加热器接通工作。该加热器在ON（接通）和OFF（关断）位之间循环，以使货舱温度保持在( ).In the COND AIR position, both shutoff valves are open and the heater is enabled. The heater will cycle ON and OFF as necessary to maintain the cargo compartment temperature between ( ).

由空调面板上的AFT CARGO（后货舱）在AIR（空气）位，两个关断活门打开且允许再循环空气进入货舱，以保持货舱温度高于（ ）。an AFT CARGO In the AIR position, both shutoff valves open to allow recirculated air into the aft cargo compartment to maintain the compartment temperature above（ ）

后货舱通风系统从（ ）循环风扇获得循环空气和或从混合总管获得空气。The aft cargo compartment ventilation system is supplied with recirculated air from recirculation fan （ ）and/or air from the mixing manifold.

向飞机提供地面空调气源的外部地面气源接口位于（ ）。An external ground air connector, located on（ ）, is provided for ground air-conditioning.

判断正误True or False: 冲压空气通风仅在空调组件失效时使用（非增压的情况）。Ram air ventilation is used only when the air conditioning packs fail (unpressurized).