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. 如果列出了大量项目在电气示意图上,则项目应按逻辑顺序呈现,如飞机上或示意图中项目的排列顺序。
B. 在电气示意图上,如果列出了大量项目,则项目应按逻辑顺序呈现,如飞机上或示意图中项目的排列顺序。
C. 如果列出了大量项目,例如电气示意图上的项目应按逻辑顺序呈现,如飞机上或示意图中项目的排列顺序。
A. Calibrated Airspeed means the speed of an aircraft, corrected for position and instrument error. Calibrated airspeed is equal to true airspeed in standard atmosphere at sea level.
B. Calibrated Airspeed means the indicated speed of an aircraft, corrected for position and instrument error. Calibrated airspeed is equal to real airspeed in standard atmosphere at sea level.
C. Calibrated Airspeed means the indicated speed of an aircraft, corrected for position and instrument error. Calibrated airspeed is equal to true airspeed in standard atmosphere at sea level.
A. The power source that are discussed respectively under the appropriate chapter heading shall provide power to at least two systems.
B. When two or more systems are served by a single power source, that power source will be discussed separately under the appropriate chapter heading.
C. The system that is powered by two or more power sources shall be discussed separately under the appropriate chapter heading.
A. This equipment is 18-feet-long.
B. This equipment is 18 foot long.
C. This equipment is 18 feet long.
A. Procedures shall be provided for all airplanes for all cases of engine failure, including partial failure, during takeoff and in flight.
B. Procedures shall be provided for all airplanes for all cases of engine failure, including intermittent failure, during roll out and in flight.
C. Procedures shall be provided for all airplanes for all cases of engine flame out, including parts failure, during takeoff and in flight.
A. These must be shown on the wiring diagram under some specific conditions and wires are color coded.
B. Wires are coded in color in certain condition, and these should be marked on the wiring diagram.
C. In some cases, wires are color coded, and these should be indicated on the wiring diagram.
A. The pilot should keep up in flight, whatever happening.
B. The pilot should keep on in flight, whatever happen.
C. The pilot should keep calm in flight, whatever happens.
A. Make sure that you use the proper amount of detergent and cold water to clean;
B. Make sure that you use correct proportions of cleaning agents and cold water;
C. Make sure that you use the accurate portion of cleaning agents and cold water;
A. Make sure that the indicated value is correct.
B. Make sure that the value shown on the controller is right.
C. Make sure that the value shown on the indicator is correct.
A. 你可以根据单词在句子中的功能和意思了解它的位置,因为动词和形容词的位置不同
B. 因为动词和形容词在句子中的位置不同,你可以根据单词的作用和意思来确定它的位置
C. 单词在句子中的位置可以告诉你它的功能以及它的意思,因为动词和形容词有不同的
