13.Each electrical system has a code to identify it.

A. 　These tests should only use the equipment or facilities installed on the aircraft.These tests should be able to perform by the flight crews.

B. 　These tests should not use the special equipment or facilities that are not installed on the aircraft.These tests should be similar to the tests performed by the flight crews.

A. 　对于使用寿命长的飞机进行检査以协助选择检查项目,大修时应进行拆卸。

B. 　为了大修而拆卸的投入使用时间长飞机,应被检查以协助选择检查项目。

C. 　为了协助选择检查项目,应检查并拆卸使用寿命长的飞机进行大修。

A. 　修正空速(CAS)仅为按需使用,以符合认证机构的任何型应要求,因为飞行员延程飞行时需按照指示空速(IAS)工作。

B. 　修正空速(CAS)仅在紧急情况时使用,以符合认证机构的任何对应要求,因为飞行员不能按照指示空速(IAS)工作。

C. 　修正空速(CAS)仅在必要时使用,以符合认证机构的任何对应要求,因为飞行员完全按照指示空速(IAS)工作。

A. 　No matter which method is adopted,the form of any publication shall comply with GAMA and use the identical basic numbering system.

B. 　Regardless of method used,any publication conforming to the GAMA format will use the same basic numbering system.

C. 　In spite of method adopted,any publication will adopt the same basic numbering system complying with the GAMA format.

A. 　该工具用于将钢索张力调节器上的标记与固定标盘上的相关指针对齐。

B. 　该工具用于将钢索张力调节器上的标记与固定标盘上的相关刻度对齐。

C. 　该工具用于将钢索弹簧调节器上的标记与固定标盘上的相关刻度对齐。

A. 　Calculate the quality of fuel and the number of shims that are necessary.

B. 　Calculate the quantity of fuel and the number of shims that are necessary.

C. 　Calibrate the quantity of fuel and the number of shims that are necessary,

A. 　Analyses were checked to identify available components and areas where exhibited lower margins of safety may exists.

B. 　To identify components and areas that may have exhibited lower margins of safety,in hand
analyses were checked.

C. 　To identify in hand components and areas,analyses were checked where exhibited lower margins of safety may exists.

A. 　If there is hum from the loudspeaker,don＇t adjust the potentiometer.

B. 　Adjust the potentiometer unless hear a hum from the loudspeaker.

C. 　Adjust the potentiometer until the loudspeaker no longer hums.

A. 　从油箱内排放大约2升燃油

B. 　从油箱内排放至少2升燃油。

C. 　从油箱内排放不超过2升燃油。

A. 　It includes items such as the inflation of shock struts.

B. 　It includes items such as the deflation of shock struts.

C. 　It includes items such as the lubrication of shock struts,