Airplane Inspection Periods: This paragraph shall contain information on the airplane (and components thereof) inspection periods. It should cover FAA required inspections (such as the annual and, in some cases, the 100 hour inspections) and manufacturer recommended inspections (such as the daily, 25-hour, 50-hour, etc.).

A. 飞机在地面上，主起落架和门是主要支撑的部分系统，包括诸如减震柱、转向轴、牵引支柱、门、连杆、连接螺栓等项目。

B. 主齿轮和门是飞机系统的一部分，在地面上提供主要支持。这个系统包括减震柱、转向轴、牵引支柱、门、连杆、连接螺栓等项目。

C. 主架和门是飞机在地面提供系统主要支撑的一部分，包括减震柱、转向轴、牵引支柱、门、连杆、连接螺栓等项目。

A. If they fail, temporary damage can occur.

B. If they drop, permanent injury can occur.

C. If they fall, permanent damage can occur.

A. Make sure that the position of the wing flaps is symmetrical.

B. Make sure that the wing flaps must move symmetrically at all time.

C. The wing flaps are moved to the symmetrical position.

A. This Issue 7 of the specification fully takes place all issues and revisions before.

B. This Issue 7 of the specification fully covers all prior issues and revisions.

C. This Issue 7 of the specification fully replaces all previous issues and revisions.

A. 描述飞机燃油系统时，应说明交替供油和燃油运输（如适用）。

B. 描述飞机燃油系统时，应提供交输供油和燃油传输（如适用）相关描述。

C. 描述飞机燃油系统时，应说明交叉供油和燃油传递（如适用）。

A. Set the tension indicator to zero.

B. Put the torque indication to zero.

C. Put the shear instrument to zero.

A. 飞机维修手册或章节至少包括下列信息：说明性信息，包括对维修或预防性维修所需要的飞机特性和数据的说明。

B. 飞机维修手册包括的内容至少有一些说明性信息，其包括对大修或预防性维修所需要的飞机特性和数据的说明。

C. 飞机维修手册或章节不仅包括下列信息，还包括对大修或预防性维修所需要的飞机特性和数据的说明。

A. 制造商可以忽略不适用于其产品的系统。

B. 厂家不能省略适用于其产品的系统。

C. 生产商可以选择其产品的相应系统

A. The Boeing 747 symbolizes the beginning of a new ear in air transport.

B. The Boeing 747 is the first type of airplane in air transport.

C. Modern air transport started from the Boeing 747.

A. Warnings, cautions and notes may be used to highlight or emphasize important points.

B. Highlight or underline the key points with alerts, attentions and comments.

C. Alerts, cautions and comments can be used to protrude or underline the key points.