A、 Make sure that the service control unit is in the open position.
B、 Make sure that the servo control unit is in the right position.
C、 Make sure that the servo control unit is in the open position.
答案：C
A、 Make sure that the service control unit is in the open position.
B、 Make sure that the servo control unit is in the right position.
C、 Make sure that the servo control unit is in the open position.
答案：C
A. As the depressurization of the alternate system, the hydraulic system A must be released to open the rudder hydraulic system selector valve and permit hydraulic fluid to flow to the rudder actuator below.
B. In order to depressurize standby system, the hydraulic system A must be depressurized to open the rudder hydraulic system selector valve and let hydraulic fluid flow to the lower rudder actuator.
C. Due to the depressurization of the alternate system, the hydraulic system A must be released to open the rudder hydraulic system selector valve and permit hydraulic fluid to flow to the bottom rudder actuator.
A. 应包含实施飞机勤务时使用正确燃油和滑油的信息。
B. 包含有关使用正确的燃油和滑油服务飞机的信息。
C. 包含有关飞机使用正确的燃油和滑油服务的信息。
A. 为了简化阅读和相互援引，插图、图形和表格应尽可能以纵向排列布局呈现。
B. 为方便阅读和相互参照，如可行，插图、图形和表格应垂直排列布局。
C. 为了精简阅读和交叉索引，插图、图标和表格如可行，应纵向排列布局。
A. 对现有分析进行了审查，以确定哪些部件和区域可能表现出较低安全边际。
B. 对现有分析进行了审查，以确定可能显示出较低安全裕度的组件和区域。
C. 现有的分析被审查，以确定可能阻止安全边际降低的部件和区域。
A. The horizontal bar goes out of view.
B. The vertical bar goes out of view.
C. The horizontal bar disappears suddenly.
A. Because pressurized air can blow contamination away from the display unit, you should not use it to clean the holes behind the display unit in order to avoid damaging the equipment.
B. Do not use compressed air to clean the holes on the rear of the display unit. Compressed air will push contamination into the display unit. This can cause damage to the equipment.
C. Do not use compressed air to clean the holes behind the display unit, because it can blow contaminants into display unit which may be damaged.
A. A mixture of fuel and oxygen can cause an explosion.
B. Fuel and oxygen react with each other to cause explosion.
C. A mixture of fluid and oxygen can be set on fire.
A. If this specification is written in professional terms, the problems won＇t arise.
B. This specification agrees with recognized industry practices, and the problems can＇t be avoided according to this specification.
C. If this specification is written in professional terms, the problems will be treated adequately.
A. “修理/改装”用于描述修理或改装说明，也可指向其他文件中的标准修理或其他地方定义的特殊修理或改装，如在服务包、服务通告等中。
B. “修理/改装”用于描述修理或改装指令，也可指向其他文件中的标准修理或其他文件（如服务包或服务通告等）中界定的特殊修理或改装。
C. “修理/改装”用于描述维修或改装说明，可能指另一份文件中的标准维修或其他地方定义的特殊维修或改装，如维修包、维修公告等。
A. 环境控制系统的这些单元和组件提供了一种加压、加热、冷却、湿度控制、过滤和处理通风区域内用于通风的空气的手段，包括压力密封部分内的区域。
B. 环境控制系统由具有提供座舱增压、加热、冷却、湿度控制、过滤和处理用来在机身密封舱内的通风空气功能的组件和部件构成。
C. 环境控制系统由具有提供座舱增压、加热、冷却、湿度控制、过滤和处理用来在机身密封舱内的循环空气功能的组件和部件构成。
