69.Use a 12-inch wrench handle during this procedure.

A. Ensure the oxygen tubes are completely clear.If oxygen is mixed with oil or compound together,it will form an explosives.Explosion can cause damage to equipment or injury to personnel.

B. Make sure that the oxygen tubes are fully clean.Oxygen and oil or grease make an explosive mixture.An explosion can cause injury or death to personnel.

C. Guarantee the oxygen tubes are completely free of dirts.Oxygen,oil andgrease can combine to form an explosive oxides.Explosions can cause casualties.

A. The applicant for an avoidance permit must show that the approval of the avoidance permit will not affect safety and must provide an explanation.The applicant shall take measures to ensure that the level of safety is equal to the level of safety provided

B. The petitioner for an exemption must include reasons why safety would not be adversely affected if the exemption is granted,or must explain the action to be taken by the petitioner to provide a level of safety equal to that provided by the rule from whic

C. The applicant for an exemption permit must state the reasons why safety will not be affected by the granted approval,or must take measures to ensure that the level of safety provided is consistent with the requirements of the regulations seeking exemption

A. Move the hose to make sure that the inner connection is stable.

B. Move the tube to ensure that the inner connection is loosen.

C. Move the tube to make sure that the inner connection is tight.

A. Landing gear position has no effect on stall speeds.

B. The position of the landing gear doesn't influence the surging speed.

C. The idle speed is not effected by the landing gear position.

A. Remove thesmooth areas with cotton cloth if you find them.

B. If you find alligatored areas,remove them with cotton cloth.

C. If there are rough areas,remove them with emery cloth.

A. 这两个小组探索了现有的受控语言,并研究了一些维护手册中的文本。结果证实单一语言是必要的。

B. 这两个小组分析了现有的可控语言,并研究了一些维护手册中的文本。结果证实简单的语言是必要的。

C. 这两个小组研究了现有的受控语言,并调查了一些维护手册中的文本。结果证实简化的语言是必要的。

D. B.这两个小组分析了现有的可控语言,并研究了一些维护手册中的文本。结果证实简单的语言是必要的。

E. C.这两个小组研究了现有的受控语言,并调查了一些维护手册中的文本。结果证实简化的

F. C.这两个小组研究了现有的受控语言,并调查了一些维护手册中的文本。结果证实简化的语言是必要的。

A. 只要一个词同时符合技术名词和技术动词的规范,该词既可以是技术名称,也可以是技术动词。

B. 同一个词可以既是技术动词也是技术名词,只要你能够在技术名词列表或者技术动词列表中找到它。

C. 如果同一个词归入技术名称类别也可以归入技术动词类别,那么该词既可以是技术名词,也可以是技术动词。

D. C.如果同一个词归入技术名称类别也可以归入技术动词类别,那么该词既可以是技术名词,也可以是技术动词。

A. If this specification is written in professional terms,the problems won't arise.

B. This specification agrees with recognized industry practices,and the problems can't be avoided according to this specification.

C. If this specification is written in professional terms,the problems will be treated adequately.

A. 飞机燃油系统从中央或主油箱提供增压的燃油。

B. 飞机燃油供应系统给来自中央或主油箱的燃油增压。

C. 飞机燃油系统提供燃油,这些燃油是从中央或主油箱增压的。

A. Before install the software,the plane has to be on the ground and the engines shut down.

B. The airplane must be on the ground with the engines off before you can install software.

C. The aircraft should be on the ground and engines power off before you upload the software.