The crew controls the aircraft direction during push back with the steering wheel.

A. Turn the knob clockwise to decrease the intensity of the light.

B. Turn the knob counterclockwise to decrease the intensity of the light.

C. In order to turn the knob clockwise, decrease the intensity of the light.

A. The introduction should be included in an alphabetical index by subject.

B. An alphabetical index by subject is to be included in the introduction.

C. The introduction includes an alphabetical index subject.

A. The computer needs to be backup at each interval.

B. The backup of the computer is necessary.

C. Back up your computer regularly.

A. Be patient while the door is opening.

B. Be aware of the door when it is opening.

C. Be careful while the door is opening.

A. 对现有分析进行了审查，以确定可能表现出较低安全裕度的部件和区域。

B. 对现有分析进行复核，对部件和区域进行标识，以显示出较低安全裕度。

C. 对于安全裕度较低的部件和区域进行标识并进行了现场分析审查。

A. When there are too many positive or subtractive pressure in the fuel tanks,the pressure relief valve eliminates damage to the wing structure.

B. When there is too much plus or minus pressure in the fuel tanks,the pressure relief valve previews damage to the wing structure.

C. The pressure relief valve prevents damage to the wing structure when there is too much positive or negative pressure in the fuel tanks.

A. Explain how to check them for proper operation and how to recognize a malfunction.

B. Describes how to check that they are functioning properly to identify faults.

C. Describes how to identify these failures so that these systems can function properly.

A. 工作准备总是第一个步骤，收尾或收工是最后一个步骤

B. 工作准备总是第一个步骤，收尾或收工是接下来的步骤

C. 第一个步骤有时是工作准备，收尾或收工是接下来的步骤

A. The portion of the system is used to eliminate or prevent the formation of ice on all airfoil surfaces, including wings and airfoil sections of the empennage.

B. The portion of the system is used to dispel or get rid of ice gathering on some aircraft surfaces, including wings and empennage surfaces.

C. The portion of the system is used to eliminate or forbid ice forming on outside parts of all airfoils, including the airfoils of wings and empennage.

A. 来自压气机的空气与来自燃油喷嘴的燃油在燃烧室混合。

B. 从压气机出来的空气和燃油在燃烧室混合。

C. 从压气机出来的空气和从燃油喷嘴出来的燃油在燃烧室燃烧。