A、 This Specification is designed to provide guidance for the development of Handbooks for all types of general aviation airplanes. These airplanes are originally certificated at minimum takeoff weights of 12,500 pounds or more.
B、 This specification is intended to provide guidance for the development of Handbooks for all types of general aviation aircraft, which are initially certificated at maximum takeoff weights of 12,500 pounds or less.
C、 This specification is intended to provide guidance for the preparation of Handbooks. For all types of general aviation aircraft, their maximum take-off weight is more than 12,500 pounds.
答案：B
A、 This Specification is designed to provide guidance for the development of Handbooks for all types of general aviation airplanes. These airplanes are originally certificated at minimum takeoff weights of 12,500 pounds or more.
B、 This specification is intended to provide guidance for the development of Handbooks for all types of general aviation aircraft, which are initially certificated at maximum takeoff weights of 12,500 pounds or less.
C、 This specification is intended to provide guidance for the preparation of Handbooks. For all types of general aviation aircraft, their maximum take-off weight is more than 12,500 pounds.
答案：B
A. When you restore the airplane to its normal condition, make sure the pin is released from the release mechanism.
B. Ensure to remove the pin from the let-go mechanism after you return from the airplane to its common position.
C. When the airplane is in good condition, you must uninstall the pin of the release mechanism.
A. Write instructions in the infinite form.
B. Write instructions in the command form.
C. Write instructions in the appropriate form.
解析：这道题考察的是写指令时所使用的语态。命令形式是 imperative form，也就是我们通常说的命令形式或者指令形式。在英语中，命令形式通常用来表达命令、请求、建议等。所以正确答案是B。
举个例子来帮助你更好地理解：假如你要告诉别人如何制作一杯咖啡，你可能会说：“Boil water, add coffee grounds, pour hot water over the grounds, stir, and enjoy!” 这里的每个动词都是用的命令形式，因为你是在向别人发出指令，告诉他们应该怎么做。
A. Distances shown are based on weak wind.
B. Distances shown are developed with no wind.
C. Distances shown are on the basis of gentle wind.
解析：首先，这道题考察的是对风速对距离的影响的理解。在航空领域，风速对飞行距离有很大的影响。如果风速为零，那么所显示的距离就是在没有风的情况下测量的距离，也就是答案B所说的"Distances shown are developed with no wind"。
举个例子来帮助理解，想象一架飞机在没有风的情况下从A点飞往B点，飞行距离是100公里。但如果有风的话，飞机在风的影响下可能需要调整飞行路线，实际飞行距离可能会有所变化。因此，为了准确测量飞行距离，通常会以零风速为基准来显示距离。
A. To know what you want to say and to use the words that give the wanted meaning shall always be assured.
B. In order to express the meaning that you want, always make sure that you know what you want to say and you use the words.
C. Always make sure that you use what you want to say to express the words with the meaning that you want.
A. If a supply shutoff valve was closed within five minutes, no maintenance performance is needed and shutoff periods are not accumulated.
B. Maintenance action is not necessary and shutoff periods are not calculated unless the shutoff valve was closed for less than five minutes.
C. When a supply shutoff valve was closed for five minutes, maintenance action is hardly required and shutoff duration are not included.
A. By using the basic provisions of FAR 21.50, revisions become consistent with the format of the specification.
B. FAR 21.50 provisions are the basic to the revisions which are consistent with the format of the specification.
C. To make revisions consistent with the format of the specification, the provisions of FAR 21.50 should be adopted as a basis.
A. Attach the aft cargo compartment forward bulkhead central panel.
B. Mount the front cargo compartment backward bulkhead center panel.
C. Fix the aft bulkhead forward panel to the forward cargo component.
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. If the hydraulic pump turns to generate pressure of 3000 psi, use the electric pump.
B. If the hydraulic pump fails to generate pressure of 3000 psi, use the electric pump.
C. If the hydraulic pump turns to supply pressure of 3000 psi, use the electric pump.
A. Use a degreasing agent to remove oil and grease.
B. Draw oil and grease from a degreasing agent.
C. Add oil and grease into a degreasing agent.
解析：这道题是关于使用去油脂剂清除油和油脂的方法。正确答案是A: 使用去油脂剂清除油和油脂。
解析：当我们需要清除表面上的油和油脂时，我们可以使用去油脂剂。这种去油脂剂可以有效地溶解油和油脂，使其容易被擦拭或清洗掉。因此，正确的做法是使用去油脂剂来清除油和油脂，而不是将油和油脂从去油脂剂中抽取出来，或者将油和油脂添加到去油脂剂中。
举个生动的例子，就好像你在厨房里做饭时不小心弄脏了炉灶上的油污，这时你可以使用去油脂剂来清洁。就像是在使用洗洁精清洗碗筷一样，去油脂剂可以帮助你轻松清除油污，让炉灶恢复干净亮丽的状态。
