This chapter includes engaging, sensing, computing, amplifying, controlling, actuating and warning devices.

A. “环境系统”一节应包括安全操作氧气系统时的必要信息，如系统能力和耐久性。

B. “环境系统”一节应包括安全操作氧气系统时的必要信息，如容量和持续时间。

C. “环境系统”一节应包括安全操作氧气系统时的必要信息，如使用期间的系统能力。

A. 在接近跑道过程中，偏差指针在航向指示器上显示飞行员正在朝哪个方向飞行。

B. 在接近跑道过程中，飞行员必须朝着航向指示器偏航指针的方向飞行。

C. 在接近跑道过程中，航向指示器的偏差指针向飞行员显示飞机必须向哪个方向飞行。

A. The portion of the system is used to eliminate or prevent the formation of ice on all airfoil surfaces, including wings and airfoil sections of the empennage.

B. The portion of the system is used to dispel or get rid of ice gathering on some aircraft surfaces, including wings and empennage surfaces.

C. The portion of the system is used to eliminate or forbid ice forming on outside parts of all airfoils, including the airfoils of wings and empennage.

A. 在左边空白处用黑色垂直线或用“手形指示”来标记确定插图的修改部分。

B. 用与修改部分相对的左边空白处的黑色垂直线或用“手形指示”来确定插图的修改。

C. 用左边空白处的黑色水平方向直线或用“手形指示”来确定插图的修改。

A. 拆下附着在法兰到盖子上的四个螺钉。

B. 拆下四个螺钉，将法兰附着到盖子上。

C. 拆下将法兰固定到盖上的四个螺钉。

A. 降低天线以获得钢索接头。

B. 降低天线以接近电缆接头。

C. 降低风向标以接近钢索接头。

A. The glideslope path is at a constant angle to the threshold of the runway.

B. The glideslope path is at a variable angle to the first end of the runway.

C. The vertical course path is at a fixed angle to the threshold of the runway.

A. It sets forth supplier recommended and FAA required retirement (removal from service) times for parts or assemblies (using hours, intervals or other appropriate determinant) and life limited parts or assemblies.

B. It sets forth manufacturer recommended retirement times for parts or assemblies (using hours, cycles or another appropriate determinant) and FAA required retirement (removal from service) times for life limited parts or assemblies.

C. It sets forth retirement times for parts or assemblies (using hours, loops or another appropriate determinant) established by the manufacturer and retirement (removal from service) times for life limited parts or assemblies required by FAA.

A. 始终保持液晶显示器在最大亮度。

B. 在液晶显示器上，最大限度保持亮度是可控的。

C. 始终保持液晶显示器的亮度处于最小状态。

A. 在将飞机恢复至初始状态前，确保已完成该步骤。

B. 确保在完成该步骤前，先将飞机置于初始状态。

C. 将飞机拖回初始位置前，应确保已完成该步骤。