The Boeing 747 marked the beginning of a new era in air transport.

A. When the cumulative revised pages (including back-up pages) exceeds 60% of the total pages of the manual, a reissue should be prepared.

B. If the updated pages, including back-up pages, were less than 60% of the total page of the manual, a new manual should be copied.

C. Up to 60% of total pages (including back-up pages) were accumulated by mistake, the manual should be rewritten.

A. Documents must be temporarily edible.

B. Documents must be readily revisable.

C. Documents must be permanently durable.

A. 每页底部应标明页码和发行日期或修订日期。

B. 每页都应有页码和日期或改版日期。

C. 每页都应有页码，并且日期或改版信息在底部。

A. 将孔铰成比标准尺寸大0.20英寸。

B. 将孔铰成比标准尺寸大0.20英尺。

C. 将孔定位成比标准尺寸大0.20英寸。

A. 正常俯仰控制法则基本上是负载系数的闭环控制，包括飞行发展保护。

B. 正常俯仰控制法基本上是负载厂家的闭环控制，包括飞行包线保护。

C. 正常俯仰控制法则基本上是负载系数的闭环控制，包括飞行包线保护。

A. 用专用尺子确定凹坑的长度。

B. 用直尺和塞尺测量凹坑的深度。

C. 用角尺和直尺测量裂纹的深度。

A. If as many as 50% of the holes are contaminated, you should clean the display units behinds the holes.

B. The holes on the bottom of the display unit should be cleaned once over 50% of them are clogged due to contamination.

C. If contamination causes a blockage of more than 50 percent of the holes, then clean the holes on the rear of the display units.

A. Setting cable tension, flight control surfaces travel limits and stops are the main tasks of rigging.

B. Cable tension set, flight controls travel limits adjustment and travel stops set are the rigging procedures.

C. Rigging involves setting cable tension, adjusting travel limits of flight controls, and setting travel stops.

A. You can get the corrected velocity by dividing the aircraft velocity by the crosswind component.

B. Divide the crosswind component by the aircraft speed to get the correction.

C. Divide the aircraft speed by the crosswind component to get the correction.

A. 将导轨嵌放在轴上。

B. 将套筒放在支杆上。

C. 把吊环钩在钩环上。