A、 This system is used to expand and return the landing gear.
B、 This system is used to extend and retract the landing gear.
C、 This system is used to extract and retract the landing gear.
答案：B
A、 This system is used to expand and return the landing gear.
B、 This system is used to extend and retract the landing gear.
C、 This system is used to extract and retract the landing gear.
答案：B
A. Carry on with the test if the pressure supply is not available.
B. Ignore the test if the pressure supply is strengthened.
C. If the pressure supply stops, cancel the test.
A. 一体式电路一般包括一体式部件以及以单片结构执行完整电路功能的器件。
B. 集成电路一般包括那些具有集成元件、以单片结构执行完整电路功能的器件。
C. 集成电路总是包括那些具有一体化元件、以整体结构实现完整电路功能的器件。
A. 大气条件，包括大的过冷水滴、冻雨或多种条件的混合，可以超过FAR参数和认证的防冰系统的能力。
B. 大气条件，包括大的超冷水滴、冻雨或混合物，可能会超出FAR规定的参数和获得认证的防冰系统能力。
C. 大气条件，包括过冷大水滴、冻雨或各种混合条件，可能会超出FAR规定的参数和经审定的防冰系统能力。
A. 如果无线电信号不清晰，重新调整频率。
B. 如果电信号没有被清除，重新调整频率。
C. 如果无线电信号没有被清除，重新调整频率。
A. 维修这个组件需要校准过的工具。
B. 安装这个组件需要专用工具。
C. 组件的安装需要精确的工具。
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. 应使用比例尺图对飞机的总体布局进行说明，该比例尺图由平面图、侧视图和正面视图组成，并在单页上以垂直顺序展示。
B. 应使用气动布局图对飞机总体安排进行说明，说明内容包括计划、侧面图和正面图，并以垂直顺序在单页上列出。
C. 应在单页上以横向顺序的呈现方式对飞机总体布局和示意图进行说明，包括平面图、侧视图和正面视图。
A. If the scratch does not go through the protective layer, the unit is serviceable.
B. If the nick does not go through the primary surface, the unit is serviceable.
C. If the scratch does not go through the protective surface, the unit is movable.
A. The units and components which store, regulate, and deliver oxygen to the passengers and crew include oxygen bottles, relief valves, shut-off valves, outlets, regulators, masks, etc.
B. The units and components which reserve, adjust, and transfer oxygen to the passengers and pilots include oxygen bottles, relief valves, shut-off valves, outlets, regulators, masks, etc.
C. The units and components to store, adjust, and transfer oxygen to the passengers and crew include oxygen bottles, release valves, shut-off valves, outlets, regulators, masks, etc.
A. If you use folding page, the page number must be invisible when folding.
B. The page number must be viewing if you fold the page.
C. If folded pages are used, the page number must be visible when folded.
