A、 This is the maximum portion of flammable vapors in air if the portion is bigger, when an ignition source touched the gas, it would cause the fire to be diffused.
B、 This is the minimum volume of flammable vapors. If the volume is lower, when the gas contacted with an ignition source. the fire would not come out.
C、 This is the minimum density of flammable vapors in air. if the density was lower, when an ignition source touched the gas, it would not cause the spread of flame.
答案：C
A、 This is the maximum portion of flammable vapors in air if the portion is bigger, when an ignition source touched the gas, it would cause the fire to be diffused.
B、 This is the minimum volume of flammable vapors. If the volume is lower, when the gas contacted with an ignition source. the fire would not come out.
C、 This is the minimum density of flammable vapors in air. if the density was lower, when an ignition source touched the gas, it would not cause the spread of flame.
答案：C
A. 如使用全新的整流罩板,请切割整流罩板获得正确尺寸。
B. 如使用替换的整流罩板,请切割整流罩板获得正确尺寸。
C. 如使用替换的整流罩,请切割整流罩获得正确尺寸。
A. When the light goes off, set the switch to NORMAL.
B. When the light is illuminated, move the switch to NORMAL.
C. When the light is extinguished, move the switch to NORMAL.
A. to arrive at the incorrect value, set the switch to position 2
B. to get the correct value, set the switch to position 2
C. to get the incorrect value, set the switch to position 2
A. The fuselage is divided horizontally by the floor, which is built up from beams and panels.
B. The fuselage is divided vertically by the floor, which is built up from beams and panels.
C. The fuselage is divided vertically by the floor,that is made from beams and panels.
A. 没有保护,材料会造成表面腐蚀
B. 材料没有保护的表面会被腐蚀
C. 材料会腐蚀没有保护的表面
A. 各类出版物宜采用水平页,不可采用垂直页
B. 各类出版物可采用垂直页,也可采用水平页
C. 各类出版物宜采用垂直页,不宜采用水平页
A. In these conditions, removal of the squibs from the fire extinguisher bottle is appropriate.
B. It is dangerous to remove the cartridges from the fire extinguisher bottle except under these conditions.
C. In these conditions, it is dangerous to remove the cartridges from the fire extinguisher bottle.
A. 出现在基本维修手册中的系统/章节/部分中的线路图同时也在单独的线路图手册中出现。
B. 线路图可能出现在基本维修手册中的系统/章节/部分中或者在单独的线路图手册中出现。
C. 线路图出现在基本维修手册中的系统/章节/部分中和单独的线路图手册中出现。
A. The difference between the two sizes must be 0.10mm or less.
B. The difference between the two dimensions must exceed 0.10mm.
C. The error between the two sizes must be less than 0.10mm.
A. That portion of the system used to control the pressure within the fuselage. Includes items such as control valves, relief valves, indicators, switches, diffuser, etc., as applicable.
B. That portion of the system used to control the pressure within the fuselage. Includes items such as control valves, negative pressure valves, indicators, switches, amplifiers, etc., as applicable.
C. That portion of the system used to control the pressure within the fuselage. Includes items such as control valves, relief valves, indicators, switches, amplifiers, etc., as applicable.
