Care must be taken not to damage the firewall cover.

A. The file must be very easy to rewrite.

B. Every document must be simple to modify.

C. Document must be readily revisable.

A. The needle moves horizontally along the gage.

B. The pointer moves vertically along the scale.

C. The indicator moves longitudinally along the edge.

A. If the tire temperature is unusually high, open the valve.

B. If the tyre pressure is insufficiently high, open the valve.

C. If the tire pressure is unusually high, open the valve.

A. After finishing the following procedure, repair the upper flange.

B. Repair the lower flange first during the procedure that follows.

C. Repair the upper flange first during the following procedure.

A. 用黑色字体在页面外侧对改版、补充和删除进行说明，对应于已经更改的部分打印内容。

B. 应在书页外侧以垂直黑线标记修订、增加和删除之处，仅对应于印刷件中已更改的内容。

C. 对于经过修订和增删的文字，沿书页外侧用粗黑直线加以标识，并仅打印修改内容部分。

A. They comprise the three parts as follows:tail assembly,the structures at the rear of the airplane ,structures forming part of and attached to the wing.

B. They include three parts,one of them is tail assembly,one of them is the structures part at the rear of the airplane,one of them is structures part that forming part of and attached to the wing.

C. They include two parts,one of them is tail assembly at the rear of the airplane that serve to control and maneuver the aircraft,another of them is structures part that forming part of and attached to the wing.

A. All range distances shall be expressed in nautical miles.

B. All range dimensions shall be defined in kilometers.

C. Nautical miles should not express all range distances.

A. This procedure does not include the removal of the cylinder.

B. This procedure does not exclude the removal of the piston.

C. This procedure does not include the removal of the piston.

A. 大多数操作都有对该项工作很重要的关键事项。

B. 最多的操作都是有关那些关键项目的。

C. 最关键的操作往往是对工作最重要的事项。

A. A small amount of oil remains in the starter.

B. Little oil is stored in the starter.

C. The starter consumes a few oil.