对于特定的形态，失速AOA 通常是固定的。然而，对于后掠翼涡轮喷气飞机，由于马赫效应失速角通常随着高度的增加而（ ）。The stall AOA is normally constant for a given configuration. However, for swept wing turbojet aircrafts the stall angle generally （ ） as altitude increases due to the Mach effect.

判断正误True or False: 通过HYD SOV电门/灯关闭液压关断活门可以控制液压油超温，而不需要关闭发动机。The HYD SOV switch/lights provide an alternate method of closing the shutoff valves eliminating the requirement to shut down an engine to control fluid overtemperature.

判断正误True or False: 在三套液压系统中，3号液压系统提供最大的液压需求。System no. 3 services the largest demands of the three systems.

判断正误True or False: 液压系统3冷却不需要使用热交换器。Hydraulic system no. 3 cooling does not use a heat exchanger.

判断正误True or False: 液压3A泵电门有三个位置选项：ON(开）/OFF(关)/AUTO(自动)。The hydraulic pump 3A switch has three positions: ON/OFF/AUTO.

判断正误True or False: 每个ACMP被一个在驾驶舱顶头面板上的液压控制面板上的单独旋钮开关控制。Each ACMP is controlled by a separate toggle switch on the hydraulic control panel on the overhead panel in the flight compartment.

判断正误True or False: 发动机驱动泵（EDP）1A和2A在驾驶舱内没有对应的控制电门。There are no flight deck control switches for EDP 1A and EDP 2A.

判断正误True or False: ACMPs 1B和2B在发动机或发动机驱动泵故障后可以自动启动。ACMP 1B and 2B can automatically start after an engine or EDP failure.

交流汇流条1为 ( ) 液压泵供电。AC BUS 1 supply electricity power for hydraulic pump （ ）.

交流汇流条2为（ ）液压泵供电。AC BUS 2 supply electricity power for hydraulic pump （ ）.

判断正误True or False: 当发动机火警时，按压ENG FIRE PUSH电门, 将通过关闭相应液压关断活门阻止液压油流向发动机驱动泵。During an engine fire condition, when the ENG FIRE PUSH switchlight is pressed, the associated hydraulic shutoff valve will be closed to prevent the flow of fluid to the EDP.