Differences in design and complexity of the various types and models of airplanes play a major role in deciding whether a specific malfunction is more appropriately listed under "emergency" or "abnormal" procedures.

A. 这部分系统被用来控制空气中的湿度，控制臭氧含量，从空调空气中去除放射性污染物，并对空气应用除氧剂、净化器等。

B. 系统的这个部分被用于控制空气中的颗粒，控制区域聚集度，过滤空调空气中活跃的无线电波，并在合适的时候对空气用除氧剂和杀虫剂等处理。

C. 系统的这部分被用于控制空气中的水分，控制臭氧浓度，过滤空调空气中的放射性碎屑，并在适用时使用除臭剂、杀虫剂等处理空气。

A. A towel is not used to dry the surface.

B. Use a towel to dry the surface.

C. The surface is dried without a towel.

A. 在每个章节的开始都是系统及其操作的描述，以“描述及操作”为标题贴上标签。如果与其它系统有交联，应该则另外进行解释。

B. 每个章节都要以一个概要介绍本系统做为开始，并且其操作和将要对操作进行的描述要进行标注。如果其中有关联，要增加解释。

C. 每一章或节都以系统及其操作的一般概述开始，并以“概述和操作”为标题。如果与其他系统之间存在相互关系，则应加以解释。

A. In the event of filler bonding to the tool, dip the tool in cold water.

B. If the filler bonds to the tool, avoid using water to moisten the tool.

C. If the filler sticks to the tool, make the tool wet by applying cold water.

A. Suggested Fuel Conservation Information shall be incorporated into this section to show the pilot how to reduce the fuel usage to a minimum.

B. In order to show the pilot how to take full advantage of fuel during operation of the airplane, Suggested Fuel Conservation Information shall be merged into this section.

C. Approved Fuel Conservation Information shall be merged into this section so as to show the pilot the fuel usage during operation of the airplane.

A. Adjust the frequency to the value giving in table 1.

B. Adjust the frequency per the value given in table 1.

C. Adjust the frequency to the value given in table 1.

A. 两个半圆形的挡板控制空气流。

B. 两个半导体的金属圈控制空气流。

C. 两个半圆形的金属圈控制空气流。

A. Check the fluid prior to mixing.

B. Prior to checking the fluid, ensure it has been mixed.

C. Never mix the fluid before testing.

A. Please do not make the USB power adapter wet with your hands.

B. When the USB power adapter is wet, please do not touch it.

C. If your hands are wet, do not touch the USB power adapter.

A. 所有发动机的燃油和控制部件都在发动机上。

B. 所有控制发动机和燃油的部件都在发动机上。

C. 所有发动机的滑油控制部件都在发动机上。