853.你可以调节音量控制。

A. There are trim tabs at the rear of both ailerons.

B. There are trim tabs at the rear of both flaps.

C. There are trimmable stabilizers at the rear of both elevators.

A. These instructions are required for towing aircraft in normal or abnormal conditions,such as from soft ground,wet or icy surfaces and in the case of engine is removing or aircraft is damaging.

B. These instructions are necessary for towing the aircraft under normal or abnormal conditions,such as from a wet or icy surface on a soft ground and when the engine is removed or the aircraft is damaged.

C. These instructions are necessary to tow or push the aircraft in normal or abnormal conditions such as towing from soft ground and slippery or icy surfaces,with engines removed,or aircraft damaged.

A. 这种冷却剂与金属不兼容。

B. 这种冷却剂与铝合金不兼容。

C. 这种冷却剂与钛合金不兼容。

A. Mach digit is the percent of true airspeed to the speed of sound.

B. Mach number is the ratio of true airspeed to the speed of sound.

C. Mach number is the proportion of real airspeed to the speed of light.

A. 数据库更新正在等待中。

B. 数据库同步正在进行中。

C. 数据库升级正在按顺序进行。

A. 确保束缚杆没有与安装在地板上的逃离滑梯支架啮合。

B. 确保束缚杆没有装在地板上的逃离滑梯支架上。

C. 确保束缚杆没有与在地板上的逃离滑梯支架对齐。

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。

A. 飞行舱是位于地板上方、前部乘客隔板和前部压力圆顶之间的舱室。

B. 驾驶舱指位于地板上方并在前客舱隔板和前增压穹状壁板之间的舱室。

C. 飞行舱是位于地面之上,位于前乘客隔板和前压力罩之间的舱室。

A. The complexity and stringency of this test or check are different from the operation conditions of the unit.

B. The test or check will change in complexity and stringency no matter what the conditions under which the unit operates.

C. Such tests or checks will vary in complexity and stringency according to the conditions under which the unit functions.

A. The format of the cruise capacity display is determined by the aircraft vendor.

B. The form of the climb performance display is decided by the aircraft manufacturer.

C. The format of the cruise performance presentation is at the discretion of the airplane manufacturer.