To get the correct clearance, add special shims, as necessary.

A. Replace the PTU check valve.

B. Interchange the PTU one-way valve.

C. Change the PTU return valve.

A. When installing the antenna, the arrows must be aligned and point forward.

B. When installing the radome, you must keep the arrow pointing forward.

C. When you install the antenna, the alignment arrow must point forward.

A. 使用良好的设备去做这项检查以及目视检查。

B. 使用正确的设备去做这项检查而不是目视检查。

C. 使用正常的设备去做这项检查而不是目视检查。

A. It is necessary to replace the fitter.

B. It is mandatory to replace the filter.

C. It is prohibited to replace the filler.

A. 来自压气机的空气与来自燃油喷嘴的燃油在燃烧室混合。

B. 从压气机出来的空气和燃油在燃烧室混合。

C. 从压气机出来的空气和从燃油喷嘴出来的燃油在燃烧室燃烧。

A. Every maintenance item has to obey a procedure.

B. Follow the procedure to do the repair.

C. For every repair, there is a procedure for us to follow.

A. 如果安装了某一个设备，那么要说明安装它的重要性。

B. 如果安装了其中一个设备，则说明它是否是必需的设备。

C. 如果安装了两个设备，需要说明其必要性。

A. The emergency procedures check list should be in concise, abbreviated form designed to remind pilots of items to check without providing details concerning the operation of any system.

B. The normal procedures check list which should be in concise, abbreviated form is designed to tell pilots of items to check without providing details concerning the operation of any system.

C. The content of the emergency procedures check list should be in concise, abbreviated form and its purpose is to remind flight attendants of items to check with providing details concerning the operation of any system.

A. 段落之下设有子段落时，可参考本规范中子段落的编排顺序，无需完全遵守。

B. 如果一个段落包含分段落，那么本规范中分段落的呈现指令仅作为指导，不作为步骤遵循。

C. 如果一个段落包括若干子段落，那么本规范中子段落表述的指令仅作为指引而遵循。

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.