垂直航迹角如何显示在PFD上？How is the vertical path angle represented on the PFD?

起动APU前须先进行火警灭火器监控测试。The FIRE DETECTION/FIREX MONITOR test shall be completed before starting APU.

根据公司最新的通告，在后推飞机期间，不得起动发动机。According to the latest notice of the company, the engine cannot be started during push-back

起动APU前须检查在直流电源简图页上显示的最低电压是24伏。
Check on DC ELECTRICAL page that the minimum voltage is 24V before starting APU

收到最终舱单后， 机长和副驾驶必须交叉检查所有飞行数据，包括（ ）
Pilot and Copilot shall cross-check all flight data after receiving the final manifest， including ( )

以下关于绕机检查描述正确的是（ ）About walkaround check, which are the correct descriptions?

旅客开始登机后飞行机组需要做些什么？What does the flight crew need to do after passenger-boarding starts?

高度表显示的高度与公布的跑道标高差异不能超过( )英尺。如果超过，不允许执飞RVSM空域。 The max difference between altitude displayed on altimeter and published runway elevation shall not be more than ( )ft. RVSM operation is prohibited if that difference being exceeded.

以下不属于驾驶舱应急设备的是（）？Which of the followings is not emergency equipment in cockpit?

申请 ATC 指令许可时，（ ）名机组成员必须在座，
并在CDU上进行记录。When applying for ATC clearance, ( ) crew members must be in position, and make records on CDU

如果出现可见水气并且外界温度等于或低于冰点，或外界温度高于冰点而上部机翼蒙皮内侧接触到局部达到冰点以下温度的燃油，则在机翼的上表面会积聚透明冰。这里的冰点是指多少？Clear ice could build up on the upper surface of the wings if visible moisture is present and the ambient temperature is at or below freezing point, or at ambient temperatures above freezing point, with subfreezing temperature fuel in contact with the underside of the upper wing skin.What is the freezing point( )