当在山谷、山脊或山区作低空飞行时，在什么时候最容易碰到乱流造成的危险

正常的起落架收放由什么提供动力：Normal landing gear extension and retraction powered:

（多选题）选择能提供主起落架和前起落架信息的3个EICAS页面（multiple choices）Select the three EICAS pages that provide information for the main and nose landing gear

如果驾驶舱内释放了一个灭火瓶，所有飞行机组必须戴上氧气面罩且选择 EMERGENCY（应急）（100%氧气）。机组若暴露在高浓度的 Halon 蒸气中，会引起头晕、身体协调性降低和思维能力下降。If a fire extinguisher is to be discharged in the flight compartment, all flight crew must wear oxygen masks with EMERGENCY selected (100% oxygen). Crew exposure to high levels of extinguishing agent vapors may result in dizziness, impaired coordination, and reduced mental sharpness.

判断正误True or False：如果探测到一个环路短路或断电，FIDEEX（火警探测）控制组件会自动转换成单环路探测，并且给 EICAS 发出信号，在 EICAS 主页面上显示一个 L/R FIRE FAIL（左/右火警探测失效）提示信息。If a loop short circuit or power failure is detected, FIDEEX (Fire Detection) control component automatically converts to a single loop probe and signals the EICAS, display an L/R FIRE FAIL on the EICAS main page (left/right fire detection)fail) prompt message.

判断正误True or False：刹车温度读数显示白色时, 刹车温度在221-492℃之间。 The brake temperature is between 221 ℃ to 492 ℃ when the readout shows white.

后货舱低速灭火瓶可以释放( )分钟。The low speed fire extinguisher bottle of AFT cargo can be discharged for ( ) minutes.

判断正误True or False：在地面APU起火，如果在 5 秒内按压了 APU FIRE PUSH 电门/灯，FIDEEX 控制组件就会转换到人工操作模式。When APU fire on ground，if the APU FIRE PUSH switch/light is pushed during the five seconds, the FIDEEX control unit reverts back to manual operation.

判断正误True or False：在地面，APU 灭火瓶在 5 秒后会自动释放，无需激活灭火瓶预位按压释放电门/灯。On ground, the APU fire bottle is automatically discharged after five seconds without the requirement to actuate the BOTTLE ARMED PUSH TO DISCHARGE switchlight.

判断正误True or False：当出现MLG BATY OVHT警告信息，立即放起落架，不必理会飞机的速度。When MLG BATY OVHT warning displays，we can put down the landing gear without any attention to the speed

判断正误True or False：刹车温度读数大于14时，显示为红色。 When the brake temperature readout is greater than 14, it will shows red.