When you lift or lower the aircraft, always keep it in a level attitude.

A. Make the panel display a warning notice in order to reveal the operation of the controls.

B. Tag a warning notice on the panel to remind the operation of the controls.

C. Put a warning notice on the panel to prevent operation of the control.

A. 为了简化阅读和相互援引，插图、图形和表格应尽可能以纵向排列布局呈现。

B. 为方便阅读和相互参照，如可行，插图、图形和表格应垂直排列布局。

C. 为了精简阅读和交叉索引，插图、图标和表格如可行，应纵向排列布局。

A. Hydraulic fluid has no effect on painted surfaces.

B. Hydraulic fluid has positive influence on painted surfaces.

C. Hydraulic fluid has passive influence on painted surfaces.

A. Do not exceed this dimension or Mach in any operation.

B. Do not exceed the regulated flight speed or Mach Number in any operation.

C. Do not exceed this speed or Mach Number in any operation.

A. 防腐有很多方法。

B. 腐蚀可能有很多原因。

C. 修正的方法有很多。

A. Airspeed values shall be expressed in knots.

B. Airspeed values shall be expressed in nautical miles.

C. Airspeed values shall be expressed in lbs.

A. An internal failure in this type of switch may allow the switch to remain closed even though the toggle or button returns to the OFF position.

B. An inner fault of this kind of switch may keep the switch clogged despite the knob or pushbutton returning to the OFF position.

C. An interior loss which occurs in this type of switch, may stay closed in spite of the OFF position of the knob or button.

A. 制造商应使用适合于特定飞行器和《飞行员操作手册》尺寸的格式。

B. 制造商应使用格式来适合特定飞机和《飞行员操作手册》尺寸。

C. 制造商使用的格式应与具体的飞机以及《飞行员操作手册》尺寸相适合。

A. 操作调光开关，确保光线的强度发生变化。

B. 操作旋转式开关，确保灯光发生变化。

C. 已调节明暗开关，灯光的亮度发生了变化。

A. 当襟翼完全放出后，马达停止。

B. 当襟翼运达终点时，马达会停止。

C. 当挡板的行程结束时，电机停止。