721、Make sure that you turn the control knob counterclockwise

A. 　与飞机相应的重量,包括类型的座椅和内部、航空电子设备、附件、标准设备和固定装置,以及基于该重量
的典型空重和最大有效载荷

B. 　与飞机相应的重量,包括典型的座椅和内部、航空电子设备、附件、标准设备和固定压舱物,以及基于该
重量的典型空重和最大有效载荷

C. 　与飞机附加的重量,包括典型的座椅和内部、航空电子设备、附件、标准设备和固定装置,以及基于该重量
的典型空重和最大有效载荷

A. 　 Because the responsibility of the operator is to comply with all the airworthiness directives and to deal with
service and overhaul the airplane as required according to the the Federal Aviation Regulations, an accurate
warning or note shall be available in this Section.

B. 　 This Section shall provide a suitable waning or note to inform the operator that his responsibility is to
ensure that all airworthiness directives are conformed to and to handle, service and maintain the airplane
when required and in accordance with the Federal Aviation Regulations.

C. 　 The purpose of warning or note in this Section is to ten the operator that responsible for verifying that all
airworthiness directives are appropriate, and that handling, servicing and maintenance of the airplane is
done when required and in accordance with the Federal Aviation Regulations.

A. 　ASD 感谢所有对本规范做出整理的组织、公司和个人。

B. 　ASD 向所有对本规范做出贡献的组织、公司和个人表示感谢。

C. 　ASD 感谢所有对本特例做出解释的组织、公司和个人。

A. 　 The seat shall be lifted to leave the track locked.

B. 　 Lift the seat until it is away from the track locks.

C. 　 Eject the seat until it is isolated from the track locks.

A. 　为避免不必要的磨损,将表面涂漆。

B. 　为避免不必要的颗粒,将表面清洁。

C. 　为避免不必要的摩擦,将表面抛光。

A. 　紧握住缸体

B. 　轻轻握住圆柱体

C. 　紧握住作动筒

A. 　 The shim is t, which is thick by calculating x and y.

B. 　 Calculate the shim, the result of the thickness is x-y.

C. 　 The thickness of the shim is thus calculated、 t=x-y

A. 　 Discard the removed fasteners.

B. 　 Throw away the removed components.

C. 　 Leave out the removed gaskets.

A. 　文件必须经常修订

B. 　文件必须易于修订

C. 　文件必须容易阅读和看见

A. 　这并不是所有可能的技术名称的完整列表。

B. 　这不是所有可能的技术名称的完成列表。

C. 　这不是所有可能的技术员名称的完整列表。