A、 Ensure that there is no corrosion on the tubes.
B、 Make sure that the tubes have no deformation.
C、 Make sure that the tubes have no crack.
答案：B
A、 Ensure that there is no corrosion on the tubes.
B、 Make sure that the tubes have no deformation.
C、 Make sure that the tubes have no crack.
答案：B
A. 加油的一项安全须知是一定在防撞灯关闭前使加油车靠近飞机。
B. 一条有关加油的安全须知是加油车必须在导航灯关闭后才能接近飞机。
C. 加油的安全须知之一是在防撞灯关闭前不要让加油车靠近飞机。
A. 在升降飞机时，要确保操作升降设备的人员接受过恰当的培训并具备相应的知识。
B. 在对飞机进行平衡、顶升或放下时，确保人员接受过升降设备的培训并掌握相关技能。
C. 当水平放置飞机或顶升飞机时，确保操作升降设备的人员学过培训知识。
A. Make sure that you can hear the 600 Hz tone at the same time.
B. Ensure that you heard the sound of 600 Hertz.
C. Be sure that you can hear the voice of 600 Hertz.
A. In flight deck, once you set probe heater switches on the overhead panel automatically, all the heater lights flash.
B. Make sure probe heater switches on the overhead panel in flight deck are in AUTO position and all the heater lights illuminate.
C. Set probe heater switches on the overhead panel in cockpit in AUTO position so that all the heater lights come into view.
A. Schematic diagram designers may make a compromise so as to add more details to make the diagram self-explanatory and keep its simplicity at the same time for ease of reading and understanding.
B. In designing schematic diagrams, it may be necessary to pay attention to both detail that is necessary to make the diagram self-explanatory, and simplicity that is essential for ease of reading and understanding.
C. Detail makes the diagram self-explanatory. Simplicity makes it easy to read and understand. It is necessary to consider both of them and make a compromise if needed when designing schematic diagrams.
A. Gives the symbols for resistors, diodes, and other parts of the system.
B. Gives the symbols for relays, resistors, and other parts of the system.
C. Gives the symbols for relays, diodes, and other parts of the system.
A. Turn the cap counterclockwise.
B. Turn the cap clockwise.
C. Rotate the cap clockwise.
A. The engine and all additional facilities use indifferent lubricants.
B. The engine uses multiple types of lubricants for different purposes.
C. The engine and all auxiliary equipment use the same lubricant.
A. 它们适用于位于05-20划分中那些案例，其中第四个数不能涵盖上面05-10子系统中致力的所有维修检查。
B. 它们是为05-20划分中的第4位数字所提供的划分数不足以覆盖上述子系统05-10所规定的所有维修检查的那些情况保留使用的。
C. 他们被预留给那些05-20第四级划分号的论据，这个划分不足以覆盖05-10子系统上方说明的所有维修检查。
A. 检查并拆下损坏的零件。
B. 检查拆下的零件是否损坏。
C. 检查损坏的零件，判断是否要拆下。
