A、 Clear the pipes in order to remove corrosion.
B、 Wash the pipes so as to remove dust.
C、 Flush the pipes to remove contamination.
答案：C
A、 Clear the pipes in order to remove corrosion.
B、 Wash the pipes so as to remove dust.
C、 Flush the pipes to remove contamination.
答案：C
A. 检查盒子里有无丢失的东西。
B. 检查盒子里内有无遗漏物品。
C. 为了找到丢失的东西需要检查盒子。
A. The lower seal appears as the lower bearing is pulled down.
B. You can see the lower seal before pulling the lower bearing down.
C. Only after you pull the lower seal down can you see the lower bearing.
A. 用净水清洗内表面。
B. 用温水清洗外表面。
C. 用冷水清洗外表面。
A. All tabulations shall own a title in order.
B. All tables shall bear a title with a number.
C. All figures shall have a title with a number.
A. 只要一个词同时符合技术名词和技术动词的规范，该词既可以是技术名称，也可以是技术动词。
B. 同一个词可以既是技术动词也是技术名词，只要你能够在技术名词列表或者技术动词列表中找到它。
C. 如果同一个词归入技术名称类别也可以归入技术动词类别，那么该词既可以是技术名词，也可以是技术动词。
A. After three full cycles, extend and retract the actuator.
B. You should extend and retract the actuator through three complete cycles.
C. Do nothing to the actuator after three complete cycles.
A. 分配子系统是用于将高于大气压的空气分配到使用系统的那部分部件。
B. 分配子系统能够将低于大气压的空气分配到用户系统。
C. 分配子系统是用于将燃油和电力分配到各使用系统的那部分部件。
A. 手册主题的顺序安排是为了增加飞行中的实用性。
B. 手册设置的主题是为了方便飞行中的使用。
C. 手册的主题中增加了在飞行中有用的顺序安排。
A. If the valve is the source of the fuel leak, discard the valve seals and install new ones.
B. If the fuel leaks out of the valve, reinstall the valve seals.
C. If the fuel leak flows towards the valve, discard the valve seals and install new ones.
A. Make sure that the pressure in the cabin is almost zero.
B. Verify that the cabin pressure is not above zero.
C. Ensure that the pressure in the cabin is completely zero.
