A、 One or more separate documents for some types of equipment such as avionics and instrumentation may be required because they change frequently or they have various combinations.
B、 Some types of equipment such as avionics and instrumentation are changed regularly or combined in different forms, requiring to have one or more separate documents.
C、 Some types of equipment such as avionics and instrumentation are often revised or combined differently to require one or more separate documents.
答案：A
A、 One or more separate documents for some types of equipment such as avionics and instrumentation may be required because they change frequently or they have various combinations.
B、 Some types of equipment such as avionics and instrumentation are changed regularly or combined in different forms, requiring to have one or more separate documents.
C、 Some types of equipment such as avionics and instrumentation are often revised or combined differently to require one or more separate documents.
答案：A
A. Do a hardness test for turning tool.
B. Conduct a hardness test for the carbide insert.
C. Take a hardness test for the chuck.
A. The trim control knob is installed on the control pedestal.
B. The trim control button is mounted under the control pedestal.
C. You can find the trim control button on the control panel.
A. 供给系统有这些用处。
B. 分散系统有这些功能。
C. 分配系统有这些功能。
A. 它应是独立的，并可重复其他测试。
B. 它应该被包含在内且能够复制其他的检测信息。
C. 它应该是自包含的，且能应用于其他检测。
A. 当需要了解膜片时，使用箭头指示方向。
B. 必要时应使用箭头表示流向来理解原理图。
C. 利用箭头指示的方向来理解线路施工图。
A. Do not go beyond this speed or Mach number besides in steady air, and then be careful.
B. Do not increase by this speed or Mach number unless in steady air, and be careful.
C. Do not exceed this speed or Mach Number except in smooth air and then only with caution.
A. To make sure that ATC transceivers are in standby mode, you must simulate altitude, otherwise false TCAS signals may occur intermittently.
B. Make sure the ATC transmitters are in standby mode, or false TCAS targets may occur accidentally due to altitude simulation.
C. Make sure that the ATC transponders are in standby mode when you simulate altitude. You can accidentally cause false TCAS targets.
A. Make sure that the hydraulic oil can be cleaned.
B. Make sure that there is no dust in the hydraulic fluid.
C. Make sure that the hydraulic fluid is uncontaminated.
A. There is a hard landing on the broken nose landing gear.
B. The landing gear has affected hard landing.
C. The nose landing gear is broken because of hard landing.
A. 在向系统中注入新滑油之前，强制性重置油滤。
B. 在向系统中注入新滑油之前，必须更换油滤。
C. 在系统中注入新滑油之前，建议更换过滤器。
