506. Aerodynamic forces are the basic forces acting on an aircraft in flight that are caused by the movement of the air over the surfaces Thurst acts forward, drag acts rearward, lift acts vertically upward and weight acts vertically downward

A. The fuel quantity processor unit sends excitation to the tank units and the compensators. The excitation receives signals from these tank units and these compensators.

B. The fuel quantity processor unit sends excitation to the tank units and the compensators. The fuel quantity processor unit receives signals from these tank unit sand these compensators.

C. The fuel quantity processor unit sends excitation to the tank units and the compensators. These tank units and these compensators receives signals from the fuel quantity processor unit.

A. 避免使用这些词来表达他们论证过的意思。

B. 一定要使用这些词的批准的意思。

C. 一定要用这些词来表达他们认可的方法。

A. 外界温度是从飞行温度指示或地面气象来源获得,根据仪表误差和压缩效应进行调整的自由空气静态温度。

B. 外界空气温度是自由的空气静止温度,能获得来自飞行中的温度指示或地面气象资源,并能校正仪表错误和压缩效果。

C. 从飞行时记录的温度或地面气流源的温度,通过调试仪器误差和压缩作用,使外来空气温度释放静止空气温度。

A. If changing or deleting of these inspection features is approved by the FAA Oversight office that manages the airplane model Type Certificate, they are mandatory.

B. These inspection features can be changed or deleted if they don＇t get approval of the FAA Oversight Office that is responsible for the airplane model Type Certificate because they are mandatory.

C. If there is no approval of the FAA Oversight, Office that manages the airplane model Type Certificate anyone cannot change or delete these inspection features that are compulsive.

A. The units used by pilots are the most valuable.

B. The units used are those which are the most expensive for pilots.

C. The units are the most useful for the pilots.

A. Did you see the movie Dangal last weekend?-No, I always go to the cinema these days. I am busy with working overtime.

B. Did you see the movie Dangal last weekend?-No, I often go to the cinema these days. I am busy with working overtime.

C. Did you see the movie Dangal last weekend?-No, I seldom go to the cinema these days. I am busy with working overtime.

A. 从海平面到温度为-56.5℃(-69.7℉).....

B. 从海平面到温度为-56.5℃(-69.7℉)的高度的温度梯度为每英尺-0.00198℃(-0.003564℉),高于该高度为零。

C. 从海平面到温度为-56.5℃(-69.7℉)...

A. This information should be able to help identify the airplane that may exceeds and icing conditions of the certificated capabilities of the airplanes provided.

B. This information shall be presented along with information to aid recognition of icing conditions which may exceed the certificated capabilities of the aircraft and its ice protection system.

C. This information should be provided with information that can help recognize icing conditions that are more than the airplane and certificated capabilities of its ice protection systems.

A. N1振动值超过该指标通常都会伴随着机身振动。

B. N1变化值超过该指标通常都会伴随着机身振动。

C. N1变化值低于该指标通常都会伴随着隔框振动。

A. Make sure that the warning light turns on within 3 seconds.

B. Make sure that the warning light is on for at least 3 seconds.

C. Make sure that the warning light is turned on in no more than 3 seconds.