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。
答案：B
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。
答案：B
A. The distribution system is used to store and distribute air pressure.
B. Distribution system is used to induct and distribute air.
C. Air inlet system is used to distribute air to all systems.
A. During the retraction test, keep a close watch on the monitor.
B. Continuously observe the indications after the retraction test.
C. Monitor the indications during the retraction test.
A. Do not let the flame become solid.
B. Never let the foam become liquid.
C. Do not let the foam become solid.
A. Always remember that the main subject of STE is for readers to hardly grasp each sentence they read.
B. Always remember that the major function of STE is to let readers comprehend every sentence they read barely.
C. Always remember that the primary objective of STE is that readers immediately understand each sentence that they read.
A. The power plant uses an air vent or propeller to produce power.
B. The power plant develops thrust either through the exhaust or through a propeller.
C. The power plant generates propulsion with the aid of the exhaust or a propeller.
A. 每间隔20秒点击一次。
B. 咔哒声的时间间隔必须为20秒。
C. 必须将咔哒声的时间间隔调整为20秒。
A. After a continued airworthiness process,almost every component composed of an airplane is involved in some form of preservation,inspection,preventative maintenance, overhaul,repair, and/or replacement activity.
B. Through a continuing airworthiness process, virtually every component comprising an airplane is involved in some form of preservation,inspection,preventative maintenance,overhaul, repair, and/or replacement activity.
C. Through a continuing airworthiness process, substantially every component of an airplane is excluded in some type of preservation,inspection,preventative maintenance, overhaul,repair, and/or replacement activity.
A. Do not open the container if you are instructed that high pressure is dangerous.
B. If it states on the container that the pressure inside is high, do not open it.
C. If the instructions give a warning about dangerous pressure, do not open the container.
A. Finish each chapter on a right-hand page.
B. Start each section on a right-hand page.
C. Start each section on a left-hand page.
A. 当反推收回时，确保飞机远离人员。
B. 当反推放出时，确保人员远离飞机。
C. 当反推运动时，确保人员远离飞机。
