A、 For purposes of this specification, "aircraft" means the relevant optional parts of the airframe and parts specified in the type certificate or supplied by the aircraft manufacturer
B、 For the intention of this specification, " airplane" is know as the airframe selective components set forth in the Type Certificate or provided by the airplane producer.
C、 For purposes of this specification, "aircraft" means the airframe and parts specified in the Type Certificate or the related optional parts supplied by the aircraft manufacturer.
答案：C
A、 For purposes of this specification, "aircraft" means the relevant optional parts of the airframe and parts specified in the type certificate or supplied by the aircraft manufacturer
B、 For the intention of this specification, " airplane" is know as the airframe selective components set forth in the Type Certificate or provided by the airplane producer.
C、 For purposes of this specification, "aircraft" means the airframe and parts specified in the Type Certificate or the related optional parts supplied by the aircraft manufacturer.
答案：C
A. This section includes all the limits of the optional systems and equipment.
B. Limitations related to optional systems may be contained in this section.
C. Only the limitations which are relevant to optional systems might be including in this section.
解析：答案解析：B。这道题考察的是关于可选系统的限制性内容可能包含在哪个部分。选项A中说这部分包括所有可选系统和设备的限制，这是一个绝对化的说法，不准确。选项C中说只有与可选系统相关的限制可能包含在这部分，这也是一个绝对化的说法，不准确。选项B中说与可选系统相关的限制可能包含在这部分，是一个相对较为准确的描述，因此是正确答案。
生活中，我们也经常会遇到类似的情况。有些事物或者规定可能会有一些限制，这些限制可能会在相关的部分或者章节中进行详细说明，这样我们就能更好地了解和遵守这些规定。所以，当我们阅读相关内容时，要仔细留意可能存在的限制性内容，以免造成不必要的麻烦。
A. Troubleshooting can only be performed after the cause of the malfunction has been found out.
B. You should perform troubleshooting according to the procedure and find out the technical failure.
C. According to the procedure, perform the troubleshooting to solve the cause of the malfunction.
A. Keep the caps off the hoses.
B. Make sure the caps are off from the hoses.
C. Take the caps off the flexible pipe.
A. Use the rigging pin to lock the pulley.
B. Use the pulley to lock the rigging pin.
C. The rigging pin should be locked by the pulley.
A. The exit doors are mainly used for passenger boarding.
B. The exit doors are only used for evacuation.
C. The exit doors are not only used for the passengers to evacuate from the airplane but also used for normal exit.
A. Through releasing the handle, the gas start to inflate the slide-raft .
B. Operation of the handle releases the gas which can inflate the slide-raft.
C. The gas handle operates to inflate the slide-raft.
A. Provide the pneumatic power for the system.
B. Supply the electrical power for the system.
C. Remove the electrical power of the system.
解析：这道题是关于系统去能化的问题。De-energize意味着去能化，也就是移除系统的电力。所以正确答案是C。
让我们通过一个生动有趣的例子来帮助你更好地理解这个概念。想象一下你的手机是一个系统，它需要电力才能正常工作。当你想要关闭手机时，你会按下电源按钮，这样手机就会De-energize，也就是移除电力，手机就会关闭。在这个例子中，De-energize就相当于移除手机的电力，让手机关闭。
A. Rivets can be used to separate the two stringers.
B. You can use two rivets to attach the stringers together.
C. Use rivets to connect the two stringers together.
A. The air pressure is almost correct.
B. The air pressure is too low.
C. The air pressure is too high.
解析：这道题考察的是空气压力的概念。选项A表示空气压力几乎正确，选项B表示空气压力太低，而选项C表示空气压力太高。根据题干中提到的空气压力高于正常，因此正确答案是C。
让我们通过一个生动的例子来帮助理解这个知识点。想象一下，你正在爬山，随着海拔的升高，空气变得稀薄，气压也会逐渐降低。如果你突然感觉到头晕眼花，这可能是因为气压太低，导致氧气供应不足。相反，如果你在潜水时深入水下，水压会增加，这时你可能感觉到耳朵有些不适，这是因为水压增加导致耳膜受压。因此，了解空气压力的概念对我们在不同环境下保持舒适和安全非常重要。
A. If the valve is the source of the fuel leak, discard the valve seals and install new ones.
B. If the fuel leaks out of the valve, reinstall the valve seals.
C. If the fuel leak flows towards the valve, discard the valve seals and install new ones.
