中纬度地区的对流层，其平均厚度大约是

发动机启动（地面）：对于第一次和第二次启动，启动机接通最长的时间是多少？Engine Start (Ground): For the first and second time, the maximum time for starting engine is:

如果指示N2 rpm超过____%，则不能使用起动机。The starter must not be used if indicated N2 rpm exceeds ___%.

判断正误：起动时滑油压力应显示正值，且可能超过峰值182psi(最大显示值)True or False:Oil pressures should show positive value during start and may peak beyond 182 psi (maximum display value).

空中尝试启动发动机时，ITT必须低于多少度？ITT must be below ____ °C before attempting to air start engine.

判断正误:地面尝试启动发动机时，ITT必须高于120度。True or False:ITT must be above 120 °C before attempting to ground start engine.

正常起飞推力和最大推力(双发)限制为____分钟Normal take-off power and maximum power (two engines) is limited to __ minutes.

当L(R) REV DEPLOYED 信息（警告）显示时，应采取的动作是：When L(R) REV DEPLOYED message (warning) is displayed the action to be taken is:

当发动机燃油温度指示（ ），禁止起飞：Take-off is prohibited with engine fuel temperature indications:

机翼防冰接通时，N2 RPM 指示器会显示？What will the N2 RPM Indicators display with wing anti-ice selected on?

自动性能储备系统（APR）的作用是什么？What is the purpose of the Automatic Performance Reserve System (APR)?