126、Adjust the potentiometer until you do not hear a hum from the loudspeaker.

A. 　 Only approved personnel can do the installation procedure

B. 　 Only releasing personnel can do the installation procedure.

C. 　 Only authorized personnel can do the replacement procedure.

A. 　机组能用飞行指令需求来控制飞机的姿态。

B. 　机组能用飞行指引指令来控制飞机的高度。

C. 　机组能用飞行指引指令来控制飞机的姿态。

A. 　本文件中的任何零件没有出版商的许可不得复制

B. 　本文件中没有任何一个部分是没有得到出版商书面许可的

C. 　未经出版商书面许可,本文件任何部分不得以任何形式复制

A. 　 It is necessary to define symbols, symbols, abbreviations and terminology for the dear understanding of
the information presented in various sections of the Handbook.

B. 　 Define signatures, short words and jargon necessary for understanding clearly of the information
contained in every section of the Handbook.

C. 　 It is important to define signs, acronyms and nomenclature for the understanding of the information
provided in this section of the Handbook.

A. 　 Access doors and panels within the area are recognized by the number of the area and two or three letter
suffix.

B. 　 The area number and a postfix with two or three letters identifies the access doors and panels in an area.

C. 　 The identification of the access panels and doors is accomplished by the zone number suffix.

A. 　 The forward and aft edges of the windshield has limits, otherwise the bottom and the top edge has not
limits.

B. 　 Because of the visibility of the bottom edge of the windshield and the top edge having the bus bar in the
way, the forward and aft edges of the windshield will be limited.

C. 　 This will be limited to the forward and aft edges of the windshield because of the bottom edge invisible
and the top edge having the bus bar in the way.

A. 　lt is permitted,if the local fire regulations and standards are more stringent than those regulations described in the following steps.

B. 　 lt is allowed, if the local fire codes and standards are more complicated than those legislations listed in the
following steps.

C. 　 lt is possible that local fire protection regulations, and standards are necessary to be used more restrictive
than those mentioned in the subsequent steps.

A. 　 The housing for the voice recorder unit has these properties、 water tolerance,
resistant

B. 　 The container for the voice recorder unit has these properties、 waterproof , spin resistant and heat
resistant.

C. 　The container for the voice recorder unit has these properties、 watertight, shock resistant and heat
resistant.

A. 　两个人必须要完成这个程序。

B. 　此过程最多需要两个人

C. 　执行这个程序需要两个人。

A. 　 The exit doors are mainly used for passenger boarding

B. 　 The exit doors are only used for evacuation.

C. 　 The exit doors are not only used for the passengers to evacuate from the airplane but also used for normal exit。.