A、 The swivel nuts on both valves engage threads on an internal stem that loosens or draws tight the valve stem to a metal seat.
B、 The rotating nuts on both valves are meshed with the threads on the inner valve stud, so that the valve stud is loosened or tightened to a metal valve base.
C、 The swing nuts on both valves engage with the threads on the internal spool, allowing the spool to loosen or tighten to the metal seat.
答案：A
A、 The swivel nuts on both valves engage threads on an internal stem that loosens or draws tight the valve stem to a metal seat.
B、 The rotating nuts on both valves are meshed with the threads on the inner valve stud, so that the valve stud is loosened or tightened to a metal valve base.
C、 The swing nuts on both valves engage with the threads on the internal spool, allowing the spool to loosen or tighten to the metal seat.
答案：A
A. 在材料表面使用工具(涂抹)使部件变得柔软。
B. 在溶液中使用工具(搅拌)使化合物变得柔软。
C. 在溶剂中使用工具(搅拌)使化合物变得柔软。
A. 驾驶舱是指地板上方、前方乘客隔板和前方压力舱顶之间的舱室
B. 驾驶舱是指地板上方、前方乘客隔板之间以及前部压力舱顶上方的舱室
C. 驾驶舱是指地板前部、前方机组隔板和前方压力舱顶之间的舱室
A. If ordering any wire bundles from Boeing is mandatory, operators has the right to purchase the bundles from other supplier and ask them to provide the base wire bundle number (61-30396in this case) and tail number of the airplane.
B. It is a necessity for the operators to provide the base wire bundle number (61-30396 in this case) and tail number of the airplane on which the bundle is to be installed if ordering any wire bundles from Boeing is necessary.
C. Operators should provide the number (61-30396 in this case) of the airplane where the bundles are to be installed on if ordering any wire bundles from Boeing is necessary.
A. In a complicated system, troubleshooting is made up of four chapters.
B. Troubleshooting in a complex system consists of four sections.
C. Four processes are combined to troubleshooting the complicated system.
A. If you cannot remove a nut because of corrosion, apply penetrating oil.
B. If you cannot disassembly a bolt because of corrosion, use penetrating oil.
C. If you cannot remove a bolt because of corrosion, apply penetrating oil.
A. On the ground, the relationship between the side stick controller angle and the elevator deflections can be changed.
B. On the ground, the relationship between the side stick controller angle and the elevator deflections cannot be changed.
C. On the ground, the relationship between the side stick controller angle and the elevator deflections is flexible.
A. 打开通气口,让氮气排出减震支柱。
B. 打开活门,让氮气进入减震支柱。
C. 打开减压阀,让氮气进入低压气瓶。
A. 这种防腐剂在华氏109度时融化。
B. 这种密封胶在华氏109度时燃烧。
C. 这种混合物在华氏109度时气化。
A. The configuration of the inlet is related to the dimension of the connector shell.
B. The size of the inlet is related to the dimension of the connector shell.
C. The figurate of the inlet is related to the dimension of the connector shell.
A. “通用规范”部分包含适用于编制所有维护标准的技术出版物要求。
B. “通用规范”部分包含适用于编制所有操作手册的技术出版物指南。
C. “通用规范”部分包含适用于编制所有维护手册的技术出版物指南。
