The trailing edge flaps are more than 25 units.

A. 放出适量燃油。

B. 注入大量的滑油。

C. 加入所需量的滑油。

A. Make sure the drain hose＇s open end is oriented in align with the structure.

B. Direct the open end of the drain hose away from the storage construction.

C. Ensure that the open end of the drain hose faces away from the structure.

A. 描述飞机座椅、座椅安全带和肩膀靠垫时，应描述如何调节座椅。

B. 描述飞机座椅、座椅绑带和肩带时，应描述如何调节座椅。

C. 描述飞机座椅、座椅安全带和肩带时，应描述如何调节座椅。

A. The airworthiness section may recommend each expected replacement time.

B. The replacement time must be set forth in part of airworthiness section.

C. Airworthiness section must set forth each mandatory replacement time.

A. The accuracy of the adjustment can vary.

B. The accuracy of the adjustment can be fixed.

C. The precision of the adjustment can be prevented .

A. 为了供应充足，沿着侧壁和天花板中心的出口将空气分离。

B. 为了供应不过量，沿着侧壁和天花板中心的出口将空气分离。

C. 为了供应对称均衡，沿着侧壁和天花板中心的出口将空气分离。

A. Evaluate the impedance between the antenna baseplate and the airplane skin.

B. Record the measured resistance between the antenna baseplate and the airplane skin.

C. Perform the measurement of the resistance between the antenna baseplate and the airplane skin.

A. Make sure that the warranty life of the material is not expanded.

B. Make sure that the retirement period of the material is not exceeded.

C. Make sure that the shelf life of the material is not expired.

A. Advisory circular must always be carried out on aircraft.

B. Advisory circular is the procedure that must be used when performing maintenance on an aircraft.

C. FAA provides advisory circular which is not always carried out on aircraft.

A. 中心句是一篇文章的第一句，也是最重要的一句。

B. 总结句是一节内容的第一句，也是最重要的一句。

C. 主题句是一段话的第一句，也是最重要的一句。