A、 However, manufacturers are following the same fundamental systems and sequence of subject arrangements even if some systems, which are not available, may be bypassed.
B、 Nevertheless, each manufacturer is expected to follow the same sequence of basic system and subject arrangements even though some systems may be omitted when not applicable.
C、 Even so, all manufacturers are expected to submit to the same arrangements of main systems and subject sequences even though certain systems would be ignored when not applicable.
答案：B
A、 However, manufacturers are following the same fundamental systems and sequence of subject arrangements even if some systems, which are not available, may be bypassed.
B、 Nevertheless, each manufacturer is expected to follow the same sequence of basic system and subject arrangements even though some systems may be omitted when not applicable.
C、 Even so, all manufacturers are expected to submit to the same arrangements of main systems and subject sequences even though certain systems would be ignored when not applicable.
答案：B
A. 维持发动机运转20分钟。
B. 使发动机怠速运转20分钟。
C. 快速运行发动机20分钟。
A. Be careful not to get acid on your skin.
B. Prohibit not to get acid on your skin.
C. Be careful not to get alcohol on your skin.
A. 机身站位360处的地板梁有低度腐蚀（长2英寸，直径1英寸）。
B. 机身站位360处的地板梁有重度腐蚀（长2英寸，半径1英寸）。
C. 机身站位360处的地板梁有中度腐蚀（长2英寸，直径1英寸）。
A. A servo system is a device that has the ability to carry out an order and give a response to fufill five basic requirements.
B. A servo system is a device that has the ability to carry out an order and give a response to orders. It can finish five basic requirements.
C. A servo system is a device that has the ability to respond to and carry out an order which must be able to fufill five basic requirements.
A. The Handbook should refer to FAR Part 43 for list of things the pilot may do.
B. FAR Part 43 has a list of things the pilot may do.
C. FAR Part 43 recommends a manual that contains a list of things the pilot may do.
A. 只有制造商和运营商做好各自工作，才能使其余整个飞机机队全部适航。
B. 只有制造商和运营商共同努力，才能保持整个飞机机队持续适航。
C. 只要制造商和运营商共同完成工作，就能保留完整飞机机队的持续适航性。
A. 滤油器内如有金属颗粒，应检查滤芯是否有磨损。
B. 滤油器内如有金属残留物，立即检查滤芯是否有磨损。
C. 滤油器内如有金属颗粒，应确认滤芯的磨损情况。
A. Examine the area that is around the drain holes for signs of corrosion.
B. Check the scavenge hole and areas around it for corrosion.
C. Make sure that there＇s no corrosion around the drain hole.
A. 对于着陆距离，应包括地面滑跑和超过50英尺障碍物的总距离。
B. 对于着陆距离，应包括地面滑跑距离和从高于着陆表面 50 英尺到着陆完全停止飞越的地面距离。
C. 对于着陆距离，应包括地面滚转和超过50英尺障碍物的总距离。
A. 要使刹车系统引气，请通过手泵手柄的整个行程来操作。
B. 要给刹车系统引气，操作手泵手柄通过系统的全部行程。
C. 全行程操作手泵手柄以给刹车系统引气。
