A、 A mixture of fuel and oxygen can cause an explosion.
B、 Fuel and oxygen react with each other to cause explosion.
C、 A mixture of fluid and oxygen can be set on fire.
答案：A
A、 A mixture of fuel and oxygen can cause an explosion.
B、 Fuel and oxygen react with each other to cause explosion.
C、 A mixture of fluid and oxygen can be set on fire.
答案：A
A. 如果发现铜颗粒, 在发现之日起的30天内重复执行整个程序(机轮不承重)。
B. 如果发现金属碎屑，从即日起在30天内完成整个修理程序（机轮承重）。
C. 如果发现琥珀色指示参数，针对发现的数据在30天内重复所有程序（机轮离地）。
A. 特殊尺寸应显示在图形中。
B. 详细尺寸应显示在图纸上。
C. 主要尺寸应显示在图纸上。
A. OEUs将主汇流条上的5V交流电转换成115V交流电以供给排呼叫灯和12V交流电的阅读灯。
B. OEUs将来自主汇流条的115V交流电转换成用于排呼叫灯的5V交流电和用于阅读灯的12V交流电。
C. OEUs将来自主汇流条的115V交流电转换成5V和12V的直流电，用于排呼叫灯和阅读灯。
A. 适航部分必须设定一个更换周期、结构检查内容、和相关结构检查程序要求的型号认证。
B. 适航部分对型号认证需要的强制更换时限、结构检查周期、和相关结构检查程序要做出规定。
C. 适航章节必须规定每次强制实施的更换时间、结构检查间隔、以及型号认证所需的相关结构检查程序。
A. If abbreviations have special meanings, they may be used.
B. Abbreviations should not be used if they are universally meaningful.
C. Only use abbreviations whose meanings are generally recognized.
A. instruments are delicate precision devices and calibrited used to measuring electrical .All instruments should be periodically checked for accuracy by the manufacturer or by some shop approved by manufacturer.
B. instruments are delicate precision devices and calibrited used to measuring electrical .All instruments should be continuously checked for correct by the manufacturer or by some shop autherized by manufacturer.
C. Electrical measuring instruments are delicate precision devices and calibrited.All instruments should be periodically checked for accuracy by the manufacturer or by some shop approved by manufacturer.
A. Obey the safety precautions when you do work with high voltages.
B. When working with high resistances, you should follow the safety precautions.
C. The safety precautions are optional in an environment with high voltages.
A. Warning is an operating procedure, inspection , repair or maintenance practice , which if not correctly followed, could result in personal injury , or loss of life.
B. You should obey the warning in an operation procedure, check, repair or maintenance practice, otherwise person injury or death will happen.
C. Warning in an operation procedure, inspection , repair or maintenance practice should be followed seriously, whereas may involve in personal injury , or loss of life .
A. 小心地把阀门组装在其位置上，并安装封圈和螺栓。
B. 小心地把阀门组件放置到位，并安装垫片和螺栓。
C. 小心地把组件阀门放置到位，并安装垫片和螺帽。
A. 应注意起落架和控制舵面锁定机构，最小转弯半径，前起落架最大牵引负载等注意事项和限制。
B. 起落架和控制舵面锁的使用、最小转弯半径、前起落架最大牵引负载等预防措施和限制信息应引起重视。
C. 应重视注意事项和限制信息，例如起落架和控制舵面锁的使用、最小转弯半径、前起落架最大推拖负载等。
