If this maneuver cannot be performed safely, a warning against attempting it shall be provided.

A. Spoilers are used to increase the drag of the aircraft in flight, or to interrupt lift during landing and during rejected take-off.

B. Spoilers are used to enhance aircraft resistance in flight or to disrupt boost during landing and when take-off is canceled.

C. Spoilers are used to increase the aircraft drag in flight, or destroy the lift during landing and in case of aborted take-off.

A. The horizontal bar goes out of view.

B. The vertical bar goes out of view.

C. The horizontal bar disappears suddenly.

A. The paper must include a three-looking picture of the unit.

B. The report must inclue a three- view drawing of the unit.

C. The diagram must include a three-side drawing of the unit.

A. 如果你发现了凹坑，做适用的维护程序。

B. 如果你发现了划痕，做具体的修理工作。

C. 如果你发现了裂纹，做适用的修理程序。

A. 这个程序包括拆卸恒速驱动装置（CSD）的说明。

B. 此程序包括删除恒速驱动装置（CSD）的指令。

C. 这个程序包括指令来去除恒速驱动装置（CSD）。

A. Use white paper with good strength characteristics and enough weight and substance to eliminate excessive print leakage when printing on both sides.

B. Use good white paper with high strength quality and of adequate weight to delete excessive show-through when printed on both sides.

C. Use white paper with good strength and of sufficient weight and substance to prevent overmuch ink show-through the paper when printed on both sides.

A. Print all pages besides wiring diagrams and foldouts on both sides.

B. Print all pages other than wiring diagrams and foldouts on both sides.

C. Print all pages no more than wiring diagrams and foldouts on both sides.

A. “螺旋桨调速器”是利用螺旋桨轮毂内变距机构，通过增大或减小螺旋桨桨距来调节发动机或螺旋桨转速的装置。

B. “螺旋桨调速器”是通过螺旋桨的螺距变化机构，通过增加螺旋桨螺距来调节发动机或螺旋桨转速的装置。

C. “螺旋桨调速器”是通过螺旋桨的螺距变化机制，通过减少螺旋桨桨距来调节发动机或螺旋桨转速的装置。

A. 可以理解的是，在某些情况下，遵守上述规定会导致重复测试程序，这是可以接受的。

B. 为了符合上述程序，有时会导致进行重复测试，这是可以接受的。

C. 可以理解为，符合上述要求就会导致接受重复测试程序。

A. “基准面”是一个假想的垂直面。以基准面为准来测量用于计算平衡的水平距离。

B. “基准面”上有一架假设的垂直平面，出于平衡考虑，所有的力矩距离都是从它开始测量。

C. “基准面”是一个假想的垂直平面，所有的横向距离都是从它开始测量的，以达到平衡的目的。