Two semicircular flappers control air flow.

A. Each Chapter or Section is to begin with a specific instruction of the system and its Operation and should be labeled “Description and Operation”.

B. A general description of the system begins with each Chapter or Section and its operation and should be labeled “Description and Operation”.

C. Each Chapter or Section is to start with a general description of the system and its operation and should be labeled “Description and Operation”.

A. 这种防腐剂在华氏109度时融化。

B. 这种密封胶在华氏109度时燃烧。

C. 这种混合物在华氏109度时气化。

A. Visual difference is acceptable between the previous surface and the new surface.

B. There should be no visual difference between the initial surface finish and the new surface finish.

C. It is forbidden to have acoustic difference between the former surface finish and the new surface finish.

A. On the label, read the date of the last inspection.

B. Check the date of latest inspection on the log.

C. On the label, make sure the date of last check.

A. The cockpit voice recorder records signals from four audio inputs during the flight.

B. The cockpit voice indicator records four audio inputs in the flight.

C. There are four cockpit voice recorders recording in-flight audio input.

A. 拆下活门旁边的泵。

B. 拆下位于泵上的活门。

C. 拆下泵旁边的活门。

A. 字典中包括一些未经更新的单词，如果您可以将它们放入应用的技术名称类别中，它们可以是技术名称。

B. 字典中包括一些未经批准的单词，如果您可以将它们放入适用的技术名称类别中，它们可以是技术名称。

C. 字典中包括一些未经批准的单词，包括技术名称，如果您可以将它们放入适用的技术名称类别中则属于此类词汇。

A. If the first coat is damaged, do a repair.

B. If the protective finish is damaged, do a repair.

C. If the primer layers are damaged, do a repair.

A. 在起飞和飞行期间，在发动机故障的情况下应对飞机采取相应措施。

B. 对于所有飞机在起飞和飞行过程中发生的所有发动机故障，应提供相应的程序。

C. 在起飞和飞行期间，对于飞机的各种发动机故障，应执行相应程序。

A. Do not jar the instruments

B. Do not pivot the instruments

C. Do not shake the instruments