Get medical aid immediately.

A. 这个单元的主要函数是控制燃油流动。

B. 这个装置的主要功能是控制燃油流量。

C. 这个组件的辅助功用是控制燃油流动。

A. A maximum distance of 50 feet is required between consumable materials and the work area.

B. Keep flammable materials at a minimum distance of 50 feet from the work area.

C. Explosive materials must be kept at least 50 feet away from the work area.

A. This tool is mandatory.

B. This tool is optional.

C. This tool is necessary.

A. 首先尝试安装有最短的螺纹区域的转接头。

B. 首先尝试安装带有最短螺纹的芯轴。

C. 首先尝试在最窄的区域内安装接头。

A. 留在部件上的溶剂可能导致腐蚀。

B. 留在部件上的密封胶能够引起侵蚀。

C. 部件表面的颗粒可能引起磨损。

A. If you do not obey these precautions, injury to your skin and lungs can occur.

B. It will cause damage to your skin and liver unless you follow the cautions.

C. If you understand the instructions, you body will not be hurt.

A. If the airplane has not been tested for twirl characteristics and recovery methods, a discussion shall be included on the limited conditions for preventing spins and the possible best recovery techniques, and it shall be stated that no testing has been conducted and that the recovery techniques are based on the manufacturer＇s best comment.

B. If the airplane has not been tested for spin characteristics and recovery methods, a discussion of prevention of spins and probable best recovery techniques will be included with a notation that no tests were made and the recovery techniques are based on the best judgment of the manufacturer.

C. If the aircraft has not been expanded for spin features and recovery ways, prevention of spin and possible best recovery techniques are discussed and it is determined that no exams have been performed and that recovery techniques are based on the manufacturer＇s best judgment.

A. Apply fuel to the steel surfaces.

B. Apply oil to the alloy surfaces.

C. Apply oil to the steel surfaces.

A. 附录应显示系统数据所在的章或子章。

B. 目录应显示章或子章以及系统路径所在的位置。

C. 索引应显示系统电路所在的章或子章。

A. 给计算机做一个备份，在常规时期。

B. 定期备份计算机。

C. 定期清理计算机。