A number in the top left corner of the display refers to a related page.

A. Before drill the hole, make sure that the point of the drill head is sharp.

B. Prior to drill the hole, make sure that the point of the drill bit is sharp.

C. Before you make the hole, make sure that the point of the drill bit is sharp.

A. When you do work with cleaning agents, use breathing equipment.

B. When you do work with cleaning fluid , use breathing equipment.

C. When you do work with cleaning fluid , use breath equipment.

A. Use some auxiliary screws to assemble the unit temporarily.

B. You shall use some additional screws to install the unit permanently.

C. Temporarily disassemble this unit using some auxiliary screwdrivers.

A. 本节必须规定型号合格证所要求的每一次强制更换时间，结构检查间隔，以及相关的结构检查程序。

B. 本节必须规定每一次强制更换时间，结构检查间隔，和机型证书所要求的相关的结构检查程序。

C. 本节必须规定部件更换的时间，结构检查时间，和相关的结构检查程序所需的型号合格证。

A. Get a sample of hydraulic fluid.

B. Scavenge the hydraulic fluid.

C. Service the hydraulic reservoirs.

A. The section of the system which is used to sense and signal the formation of ice.

B. The portion of the system which is used to detect and display the condition of ice.

C. The portion of the system which is used to detect and indicate the formation of ice.

A. Examine the door stop fittings for cracks and corrosion.

B. Examine the door stop fittings for dent and corrosion.

C. Examine the door stop fittings for cracks and nick.

A. When the movement of input rod is ranged from 5 to 10 mm, measure the piston retraction.

B. When the input lever is between 5 and 10 mm, measure the piston extension.

C. When the interval of input shaft changes between 5 and 10 mm, measure the expansion of the piston.

A. Make sure that the warranty life of the material is not expanded.

B. Make sure that the retirement period of the material is not exceeded.

C. Make sure that the shelf life of the material is not expired.

A. 控制部分控制螺旋桨叶片俯仰，但不包括任何与螺旋桨组件一起旋转的部件。

B. 控制部分能够控制螺旋桨桨叶的桨距，但不包括任何与螺旋桨组件一起旋转的部件。

C. 控制部分控制螺旋桨叶角度，包括任何与螺旋桨组件一起旋转的部件。