A、 The fragile connector is usually closed.
B、 The quick-break switch is normally in the off position.
C、 The frangible fitting is a normally closed valve.
答案：C
A、 The fragile connector is usually closed.
B、 The quick-break switch is normally in the off position.
C、 The frangible fitting is a normally closed valve.
答案：C
A. 将导轨嵌放在轴上。
B. 将套筒放在支杆上。
C. 把吊环钩在钩环上。
A. The complexity and stringency of this test or check are different from the operation conditions of the unit.
B. The test or check will change in complexity and stringency no matter what the conditions under which the unit operates.
C. Such tests or checks will vary in complexity and stringency according to the conditions under which the unit functions.
A. 如果故障频繁出现，进行系统测试。
B. 如果故障定期出现，进行系统测试。
C. 如果故障随机出现，进行操作测试。
A. 评估一个事故造成的损伤。
B. 通过事件来检查一个损伤。
C. 事故后检查损伤。
A. 对于这个地区以外的人来说，这些词很难理解。
B. 对于这个工作专业以外的人来说，这些词很难理解。
C. 对于这个空域以外的人来说，这些词很难听清楚。
A. Definitions in this manual shall be conformed with those in the Federal Aviation Legislations.
B. Definitions in the handbook shall be consistent with definitions contained in the Federal Aviation Regulations.
C. Definitions in the Federal Aviation Regulations shall be consistent with definitions contained in the handbook.
A. 这些组件和部件产生、控制、分配和点燃部件的燃料气缸，为活塞式发动机或涡轮发动机的燃烧室或推力增强器中的空气混合物提供电流。
B. 这些组件和部件能够产生、控制、分配用于点燃活塞发动机的气缸以及涡轮发动机的燃烧室或加力燃烧室中的油气混合气所需的电流。
C. 这些单元和部件产生、控制、分配和点燃部件的燃料气缸，为涡喷式发动机或涡轮发动机的燃烧室或推力增强器中的空气混合物提供电流。
A. These instructions are required for towing aircraft in normal or abnormal conditions, such as from soft ground, wet or icy surfaces and in the case of engine is removing or aircraft is damaging.
B. These instructions are necessary for towing the aircraft under normal or abnormal conditions, such as from a wet or icy surface on a soft ground and when the engine is removed or the aircraft is damaged.
C. These instructions are necessary to tow or push the aircraft in normal or abnormal conditions such as towing from soft ground and slippery or icy surfaces, with engines removed, or aircraft damaged.
A. 描述飞机刹车系统时，应阐述如何最大程度地发挥刹停作用的同时延长刹车的最大寿命。
B. 描述飞机刹车系统时，应描述如何使用最大刹车以及最大程度地延长刹车的使用寿命。
C. 描述飞机刹车系统时，应阐述如何获得最大制动并制动器的最大寿命。
A. The AFDS monitors three separate autopilot channels and a single Mode Control Panel(MCP)
B. The AFDS constitutes three separate autopilot channels and a single Mode Control Panel(MCP)
C. The AFDS contains three separate autopilot channels and a single Mode Control Panel(MCP)
