There are three classes of structure: primary, secondary and tertiary.

A. You must obtain medical help as soon as you can.

B. You must obtain medical help as more as you can.

C. You must obtain medical instructions as soon as you can.

A. For normal operations, make sure the pressure relief valve is closed. An open pressure relief valve is a symptom of a problem in the fuel vent system.

B. For normal operations, make sure the shutoff relief valve works. If you open pressure relief valve, that indicates a problem in the fuel vent system.

C. For normal operations, make sure you close the pressure relief valve. If you leave it open, a problem will be shown in the fuel vent system.

A. 余下说明仅适用于装有机身油箱的飞机。

B. 装有中心油箱的飞机可以参考下面的说明。

C. 下面的说明阐述了装有机身油箱的飞机的操作规范。

A. 应注意起落架和控制舵面锁定机构，最小转弯半径，前起落架最大牵引负载等注意事项和限制。

B. 起落架和控制舵面锁的使用、最小转弯半径、前起落架最大牵引负载等预防措施和限制信息应引起重视。

C. 应重视注意事项和限制信息，例如起落架和控制舵面锁的使用、最小转弯半径、前起落架最大推拖负载等。

A. 该指示器显示水箱的流量。

B. 该指示器显示油箱中的液压油量。

C. 该指示器显示加入油箱的油量。

A. 控制部分控制螺旋桨叶片俯仰，但不包括任何与螺旋桨组件一起旋转的部件。

B. 控制部分能够控制螺旋桨桨叶的桨距，但不包括任何与螺旋桨组件一起旋转的部件。

C. 控制部分控制螺旋桨叶角度，包括任何与螺旋桨组件一起旋转的部件。

A. To gain entry to the nearby structure, take out the sensor.

B. Remove the sensor to get access to the adjacent structure.

C. Disassemble the sensor to get access to the adjacent structure.

A. 本部分应包含一个建议，为了获得服务和信息，经销商或有证书的服务站应与飞机运营商建立沟通。

B. 此章节讲述了为获得勤务信息，经销商或有授权的服务站应与飞机运营商建立相互联系和沟通。

C. 本节应建议飞机运营商与经销商或认证服务站建立联系，以获得服务和信息。

A. Magnetic tools have an unwanted effect on the compass system.

B. Metallic tools are of positive effect on the compass system.

C. Magnets can affect the compass system adversely.

A. The airworthiness and safe operation of an airplane is assured if it＇s used as its original design purpose, properly inspected and carefully maintained.

B. The manufacturer is intended to utilize an airplane with sound inspection and maintenance practices because that is the basis for assuring the airplane remains airworthy and safe to operate.

C. The airplane is designed to be used as the manufacturer＇s intention. Users shall properly inspect the airplane and do sufficient maintenance to assure its airworthiness and operation safety.