A、 The emergency exit doors are known as, backup exit and they should not be used in special condition.
B、 The emergency exit doors are used for the escape and are not used as the normal exits.
C、 The emergency exit doors are applied to board that are not usually used for exit.
答案：B
A、 The emergency exit doors are known as, backup exit and they should not be used in special condition.
B、 The emergency exit doors are used for the escape and are not used as the normal exits.
C、 The emergency exit doors are applied to board that are not usually used for exit.
答案：B
A. Slowly and fully extend the RAT and make sure that it does not touch other parts.
B. Quickly and fully retract the RAT and make sure that it does not touch other parts.
C. Slowly and carefully extend the RAT and make sure that it does not attach to other parts.
A. 在作动控制之前请不要连接锁定机构。
B. 在操作控制杆之前请断开锁销。
C. 在移动控制杆之前请解锁权。
A. Documents shall be easy to revise
B. Documents must be ready to revise
C. Documents shall be ready to change
A. The power source that are discussed respectively under the appropriate chapter heading shall provide power to at least two systems.
B. When two or more systems are served by a single power source, that power source will be discussed separately under the appropriate chapter heading.
C. The system that is powered by two or more power sources shall be discussed separately under the appropriate chapter heading.
A. 在最后运转发动机20分钟。
B. 在地面运转发动机20分钟。
C. 发动机慢车运转20分钟。
A. Measure the vertical distance between the two parts.
B. Test the vertical clearance between the two components.
C. Measure the lateral distance between the two parts.
A. The instruments that are light in weight and small in volume are used in the space shuttle.
B. The instruments where are light in weight and small in volume are used in the space shuttle.
C. The instruments which are light in weight and small in volume are used in the space airplane.
A. need
B. must
C. mandatory
A. 热电池汇流条通常接受动力,从主电池或者主电池转换器中。
B. 热电池组件通常接受动力,从主电池或者主电池充电器中。
C. 热电池汇流条通常从主电池或者主电池充电器中获得动力。
A. It is suggested that nickel plated corrosion resistant steel or nickel-plated steel fittings be used as alternatives for aluminum fittings in the high pressure and normal brake return systems between the antiskid module and parking brake module.
B. Suggest using vanadium plated corrosion resistant steel or vanadium plated steel fittings as alternatives for aluminum fittings in the high pressure and normal brake return systems between the antiskid module and parking brake module.
C. It is recommended that cadmium plated corrosion resistant steel of cadmium plated steel fittings be used as replacements for aluminum fittings in the high pressure and normal brake return systems between the antiskid module and parking brake module.
