351、 Shutoff the airflow in the air conditioning ducts to be inspected.

A. 　 in STE, a unit started with 'topic sentence" is to instruct the main topic

B. 　 The “topic sentence" starts to tell the readers the topic of the paragraph-inST6.

C. 　 In STE, a paragraph starts with a "topic sentence which tells the reader what the topic of that paragraph is.

A. 　一台发动机可以为所有系统供电

B. 　一台发电机可以为所有系统供电

C. 　 一台动力装置可以为所有系统供电
参:B

A. 　检查密封件是否有缺陷

B. 　检查密封胶是否有缺陷

C. 　检查封严是否有缺失

A. 　 Normally for an aircraft that has tail wheels, you can tow the tail wheels forward. Todor this you can
connect the tow bar to the main landing gear.

B. 　 Usually, for an aircraft that has tail wheels, you can link the tow bar to the main landing gear, thus you can
tow the aircraft forward.

C. 　 For an aircraft that has tail wheels; you can tow the aircraft forward only when the tow bar is linked to the
main landing gear.

A. 　 Exterior Plates and Signs are required for ground servicing instructions, checks, warnings and cautions.

B. 　 External Placards and Symbols are necessary for ground servicing instructions, inspections warnings and
cautions.

A. 　仔细检查组件来确定是否有进一步的损坏。

B. 　目视检查组件来确定损坏的部位。

C. 　目视检查组件来确定损坏的程度。

A. 　 Visually check the forward engine mount to the fan frame bolts if they are correctly installed and damaged.

B. 　 Do visual check of the bolts which attach the forward engine mount to the fan frame for the correct installation and damage.

A. 　给出了允许使用的动词,不要使用未列出的动词形式

B. 　动词以批准的表格列出,不要使用表中未列出的动词

C. 　给出了动词允许使用的形式,不要使用未列出的动词形式

A. 　航行灯由亮变暗。

B. 　导航灯由暗变亮。

C. 　转弯灯由暗变亮。

A. 　 This procedure is only for repairs that include a very small number of screws.

B. 　 This procedure is only for repairs that include a very small number of nuts.

C. 　 This procedure is only for repairs that include a very small number of rivets.