An "emergency", however, almost always involves a failure that requires immediate and rapid response, such as a total powerplant failure, fire or smoke, or rapid cabin decompression.

A. Possibly, the incorrect operation will occur due to the contaminated oil jet.

B. Incorrect operation is absolutely resulted from a blocked ignitor.

C. A blocked oil jet can cause incorrect operation.

A. Use backthrust to change the direction of the exhaust to achieve contrary thrust.

B. Thrust reverser is used to change the direction of the exhaust gases for reverse thrust.

C. To change the direction of the exhaust nozzle, the thrust reverser is used to obtain the opposite thrust.

A. To simplify the overall master wiring diagram to make it easy to understand, complex systems should be described in terms of functional interconnections.

B. The overall master wiring diagrams are too complex to be understandable, so the presentation of the systems shall be simplified and the interconnections should be plainly noted.

C. To make the wiring diagrams simplified and understandable, the complex systems should be described in system-functions. The connection of each system shall be presented clearly.

A. Do not alleviate pressure to the aft flange.

B. Do not apply pressure to the aft flange.

C. Do not apply pressure to the aft screw bolt.

A. 涂料足够柔软，用塑料铲子将其去除。

B. 涂料足够柔软，用塑料楔子将其去除。

C. 涂料足够柔软，用胶铲子将其去除。

A. 需每隔一年就清理一下过滤器。

B. 有必要持续清理过滤器。

C. 有必要定期清理过滤器。

A. 如果一个代词能参考文本中的一个或多个名词，它会使句子产生异义。如果一个句子产生异义，参考原词更换代词。这将使读者更清楚易读。

B. 如果一个代词能指代文本中的一个或多个名词，它会使句子模棱两可。如果一个句子模棱两可，用它所指的词代替代词。这将使句子更清楚易读。

C. 如果一个代词能引申文本中的一个或多个名词，它会使句子晦涩难懂。如果遇到这样的情况，更换所引申的代词。这将使句子更清楚易读。

A. 飞机爬升会影响导航系统。

B. 导航系统受飞机爬升角度的影响。

C. 飞机爬升率会影响导航系统。

A. Clamps should be spaced at intervals not exceeding 24 inches. Clamps on wire bundles should be selected so that they have a snug fit without pinching wires.

B. Pins should be spaced at intervals not exceeding 24 inches. Pins on harness should be selected so that they have a snug fit without pinching wires.

C. Pins should be spaced at intervals not exceeding 24 inches. Pins on harness should be selected so that they have a snug fit without scratching wires.

A. 聚氨酯被用于生产小型飞机的机身、机翼尖和其他曲面部件；相对便宜，抗燃油，与大多数胶粘剂兼容；不要使用热线切割聚氨酯泡沫；使用大型刀具和打磨设备可很容易地塑形。

B. 聚氨酯被用于生产小型飞机的机身、机翼尖和其他曲面部件；相对便宜，不易与燃油发生反应，与大多数胶粘剂兼容；不要使用热线切割聚氨酯泡沫；使用大型刀具和砂子可很容易地塑形。

C. 聚氨酯被用于生产小型飞机的机身、机翼尖和其他曲面部件；相对便宜，不易与燃油发生反应，与大多数胶粘剂兼容；不要使用热线切割聚氨酯泡沫；使用大型刀具和砂纸可很容易地塑形。