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. 如果下雪,确保车辆在合适的构型
B. 如果下雪,确保车辆在安全区域
C. 如果下雪。把车间移动到安全的区域
A. 不能使用缩写,除非有意义。
B. 不能使用缩写直到它们有通用意义。
C. 除非缩写具有普遍意义,否则不得使用缩写。
A. 如果它明显地影响了巡航参数,重力的效果也应该纳入规划。
B. 如果它大大地改变了巡航表现,重量的效果也应该被考量。
C. 如果重量对巡航性能有显著影响,也应该将其影响列入计划。
A. RECORD
B. COPY
C. ENTER
A. The safety procedures are provided by the operators.
B. The safety procedures are provided to the manufacturers.
C. The safety procedures are provided by the manufacturers.
A. If you cannot remove a nut because of corrosion, apply penetrating oil.
B. If you cannot disassembly a bolt because of corrosion, use penetrating oil.
C. If you cannot remove a bolt because of corrosion, apply penetrating oil.
A. Vertical axis passes horizontally through the center of gravity of an aircraft.
B. Vertical axis passes vertically through the center of gravity of an aircraft.
C. Vertical axis of an aircraft is an imaginary line passing vertically through the center of gravity of an aircraft. The vertical axis is called the pitch axis.
A. 感抗匹配变压器向扬声器提供60W的输出。
B. 感抗匹配整流器向扬声器提供60W的输出。
C. 阻抗匹配变压器向扬声器提供60W的输出。
A. 系统中扩大声音调制电磁波来传送和/或接收空对空或空对地装置的信息的系统部分。
B. 系统中利用声音调制电磁波来传送和/或接收空对空或空对地装置的信息的系统部分。
C. 系统中利用音调制电磁光束来传送和/或接收空对空或空对地装置的信息的系统部分。
A. Only approved personnel must operate the brakes.
B. Only trained personnel must operate the brakes.
C. Only approved people must operate the brakes.
