A、 Loosen the cross nuts [10] on reducer [7] and standby valve [8] on each end of air pressure filter assembly [1].
B、 Loosen the swivel nuts [10] on reducer [7] and bypass valve [8] on each end of air pressure filter assembly [1].
C、 Loosen the cotter nuts [10] on reducer [7] and bypass valve [8] on each end of air pressure filter assembly [1].
答案：B
A、 Loosen the cross nuts [10] on reducer [7] and standby valve [8] on each end of air pressure filter assembly [1].
B、 Loosen the swivel nuts [10] on reducer [7] and bypass valve [8] on each end of air pressure filter assembly [1].
C、 Loosen the cotter nuts [10] on reducer [7] and bypass valve [8] on each end of air pressure filter assembly [1].
答案：B
A. 安装程序中，请佩戴防护罩。
B. 焊接过程中，请佩戴防护罩。
C. 在拆卸程序中，请佩戴防护罩。
A. 描述飞机电源系统时，应提供相关限制、警告和操作提示。
B. 描述飞机电源系统时，应解释相关束缚、警示和操作提示。
C. 描述飞机电源系统时，应提供相关限制、警告和操作警示。
A. Make sure there is no leakage of hydraulic fluid at the router.
B. Make sure there is no leakage of hydraulic fluid at the transducer.
C. Make sure there is no leakage of hydraulic fluid at the transponder.
A. 在触碰热表面时，这种材料会释放出危险的香味。
B. 在接触到热的操纵舵面时，这种材料会产生奇怪的烟雾。
C. 这种材料接触热表面时会释放出危险的烟雾。
A. Manufacturers＇ recommended time limits, maintenance checks and inspections (both planned and unplanned) are arranged in Chapter 5.
B. Manufacturers＇ recommended time limits, maintenance checks and tests (both scheduled and unscheduled) are arranged in Chapter 5.
C. Manufacturers＇ recommended time limits, maintenance checks and inspections (both scheduled and unscheduled) are arranged in Chapter 5.
A. 打开左（右）系统面板L42（R42）。
B. 打开左（右）组件面板L42（R42）。
C. 打开左（右）接近面板L42（R42）。
A. Charge the battery.
B. Fill the battery.
C. Add the battery.
A. 做步骤1到4以确保没有剪切载荷施加到端头上。
B. 做步骤1到4以确保没有径向载荷施加到轴上。
C. 做步骤1到4以确保没有轴向载荷施加到杆上。
A. Do a hardness test for turning tool.
B. Conduct a hardness test for the carbide insert.
C. Take a hardness test for the chuck.
A. 发电机提供三相电压。当发电机转子速度升高时，此电压的频率会增加。
B. 发电机提供三相电压。当发动机转子速度升高时，此频率的电压会增加。
C. 发电机提供三相电压。当发电机转子频率升高时，此电压的变化速度会增加。
