什么是过冷水？

判断正误True or False：当飞机在地面上，双发和APU都在运转时，APU总是优先向飞机气源系统提供引气。On the ground, with both the engines and APU running, the APU always has priority in supplying the bleed air for the aircraft pneumatic systems.

引气总管由（ ）分为两部分。The bleed air manifold is divided into two sections by：

APU LCV失效在安全( )位。The APU LCV is fail-safe（ ）.

判断正误True or False：没有HPV操作的EICAS指示。There are no EICAS indications of HPV operation.

当地面气源车运行时，引气活门必须选择( )。For ground cart operations, the bleed valves must be selected（ ）.

判断正误True or False：每个ACSC有两个通道。工作通道每天都会自动切换。Each controller consists of two channels. Active channel assignment is automatically switched on a daily basis.

压力调节关断活门(PRSOV)位于每个发动机的引气供应线, 其需要至少的( )压力才能打开。A Pressure Regulating and Shutoff Valve (PRSOV) is located in the bleed air supply line from each engine, The PRSOV requires a minimum of ( ) upstream pressure to begin opening.

判断正误True or False：在人工方式下，APU作为引气源时禁止选择机翼和整流罩防冰。Wing and/or cowl anti-ice selection is prohibited with the APU as a bleed source in manual mode.

当左引气区域的两个泄漏探测系统的探测通道同时发生故障时，将显示相应的( )警戒信息。Failure of both detection channels of the bleed air leak detection system in left bleed zone is indicated by the applicable ( ) caution message.

右整流罩防冰活门之前的引气管路漏气，将显示（）警告信息。If the leakage occurs in the bleed ducting before the R cowl anti-icing valves, the appropriate ( ) warning message is displayed.