A、 所有在此区域人员必须使用护目镜。
B、 所有在此区域人员必须使用防护服。
C、 所有在此区域人员必须使用呼吸设备。
答案：C
A、 所有在此区域人员必须使用护目镜。
B、 所有在此区域人员必须使用防护服。
C、 所有在此区域人员必须使用呼吸设备。
答案：C
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. 警告
B. 注意
C. 注释
A. Set the switch to on.
B. Move the switch to on.
C. Put the switch to on.
A. That portion of the system which is used to store and deliver wash water which is not potable
B. The part of a system used to store and transport drinking water.
C. The part of a system used to store and trans port non-potable water.
A. However, manufacturers may omit System/Chapters that are not applicable to the product or combine Systems/Chapters where it is feasible.
B. However, manufacturers may adopt Systems/Chapters that are not applicable to the product or constitute systems/Chapters when necessary.
C. However, operators may omit Systems/Chapters applicable to the product or constitute Systems/Chapters where practical.
A. The output of AND gate is one when either of its inputs is logic one.
B. There is absolute no relationship between the output and input of the AND gate.
C. The output of AND gate is one only when all the inputs are logic one.
A. It is not permit to work with any uncontrolled technical document for maintenance work.
B. It is not permitted to work with any uncontrolled technical document for maintenance work.
C. It is not allowed to work with any unreliable technical document for maintenance work.
A. The water quantity transmitter is easily damaged;
B. The water quantity transmitter is expensive;
C. The water quantity transmitter is unstable;
A. 制造商报告任何发现的裂纹。
B. 向制造商报告任何发现的裂纹。
C. 制造商记录任何发现的裂纹。
A. 仪表近进着陆要求地表足够平整。
B. 仪表近进着陆要求空域交通顺畅。
C. 仪表近进着陆要求航空器有足够的离地高度。
