1793.Center of gravity is the point at which an airplane would balance if suspended.Its distance from the reference datum is found by dividing the total moment by the total weight of the airplane.

2907.在钻孔之前,要确保钻头的尖端是锋利的。

A. Before drill the hole,make sure that the point of the drill head is sharp.

B. Prior to drill the hole,make sure that the point of the drill bit is sharp.

C. Before you make the hole,make sure that the point of the drill bit is sharp.

2146.Revisions,additions and deletions shall be identified by a vertical black line along the outside of the page opposite only that portion of the printed matter that was changed.

A. 用黑色字体在页面外侧对改版、补充和删除进行说明,对应于已经更改的部分打印内容。

B. 应在书页外侧以垂直黑线标记修订、增加和删除之处,仅对应于印刷件中已更改的内容。

C. 对于经过修订和增删的文字,沿书页外侧用粗黑直线加以标识,并仅打印修改内容部分。

48.Cracks can have a maximum length of five inches.

A. 刮痕的最大长度为 5 英寸。

B. 裂缝的最大长度为 5 英寸。

C. 刮痕的最大长度为 5 英尺。

2869.最大着陆重量是着陆触地所批准的最大重量。

A. Maximum Landing Weight is maximum weight supplied for the landing contact.

B. Minimum Landing Weight is minimum weight provided for the landing touchdown.

C. Maximum Landing Weight is maximum weight approved for the landing touchdown.

2645.空调系统将机身增压舱的空气保持在正确的压力、温度和新鲜度。

A. The air conditioning system keeps the air in the pressurized fuselage compartments at the correct pressure,temperature and freshness.

B. The air conditioning system keeps the air in the pressurizing cabin of the fuselage at the correct pressure,temperature and freshness.

C. The air conditioning system keeps the air in the pressurized cabin of the fuselage at the correct pressurization,temperature and freshness.

1506.Other procedures essential or pertinent to the operation of the airplane may be included in the Handbook.

A. 手册中可包括其他的程序,这些程序适用于飞机操作。

B. 与飞机操作有关或必要的其他程序可包括在手册中。

C. 说明中应包括飞机操作相关或适用的其他程序。

1062.Such tests or checks will vary in complexity according to the conditions.

A. Such tests or checks will be completed according to the conditions.

B. Such tests or checks will be very complex according to the conditions.

C. Such tests or checks will be different in complexity according to the conditions.

715.水平条从视野中消失。

A. The horizontal bar goes out of view.

B. The vertical bar goes out of view.

C. The horizontal bar disappears suddenly.

2791.The cooled air from the air cycle machine can no longer hold the quantity of water it could when it was warm.A water separator is used to remove the water from the saturated air before it is sent to the aircraft cabin.Foggy air from the ACM condenses and coalesces the mist into larger water drops in the water separator.The water collects on the sides of the separator and drains down and out of the unit,while the dry air passes through.

A. 从空气循环机出来的冷却空气与其没被冷却时比不再能承载那么多的水。水分离器被用来把水从饱和的空气中除掉,然后空气再进入座舱。来自于空气循环机的水雾装的空气在水分离器中凝结成大水滴。水在水分离器中越来越多然后排出空气循环机,而干燥的空气继续向后流。

B. 从空气循环机出来的冷却空气与其没被冷却时比不再能承载那么多的水。水分离器被用来把水从饱和的空气中除掉,然后空气再进入座舱。来自于空气循环机的水雾装的空气在水分离器中凝结成大水滴。水在水分离器中越来越多然后排出水分离器机,而干燥的空气继续向后流。

C. 从空气循环机出来的冷却空气与其没被冷却时比不再能承载那么多的水。水分离器被用来把水从湿润的空气中除掉,然后空气再进入座舱。来自于空气循环机的水雾装的空气在水分离器中凝结成大水滴。水在水分离器中越来越多然后排出空气循环机,而干燥的空气继续向后流。

D. C.从空气循环机出来的冷却空气与其没被冷却时比不再能承载那么多的水。水分离器被用来把水从湿润的空气中除掉,然后空气再进入座舱。来自于空气循环机的水雾装的空气在水分离器中凝结成大水滴。水在水分离器中越来越多然后排出空气循环机,而干燥的空气继续向后流。

113.Stop the test after 2 seconds.

A. 停止测试 2 秒钟

B. 2 秒后启动测试

C. 2 秒后终止测试