A、 Put a plug on the open end of each pipe.
B、 On the opening of each pipe,put a cover.
C、 Put a cover on the loose end of the pipe.
答案：A
A、 Put a plug on the open end of each pipe.
B、 On the opening of each pipe,put a cover.
C、 Put a cover on the loose end of the pipe.
答案：A
A. 对退漆后的表面的修理必须是面积小于 100 平方英寸(645 平方厘米),如果超过这一面积,则必须得到额外批准。
B. 对于分层的表面修理,面积不得超过 100 平方英寸(645 平方厘米)。如果超出,你必须做部分更换。
C. 装饰面的修补面积必须小于 100 平方英寸(645 平方厘米),如果超过这一面积,则必须更换该部件。
D. C.装饰面的修补面积必须小于 100 平方英寸(645 平方厘米),如果超过这一面积,则必须更换该部件。
A. 定位器与跑道中心线对齐,下滑道与跑道出口成一定角度。
B. 航道与跑道中心线对齐,下滑道与跑道入口成恒定角度。
C. 航道与跑道中心线平行,下滑道与跑道出口成恒定角度。
A. Emergency illumination refers to an individual and dependent subsystem which is used to provide lighting when the main electrical power fails.
B. Emergency lighting can provide illumination for an individual and independent subsystem in case of main electrical power failure.
C. Emergency lighting is the separate and independentsubsystem used to provide illumination in case of primary electrical power failure.
A. Install the cushion before you install the seat.
B. Install the seat before you install the cushion.
C. Install the seat after you install the cushion.
A. When a capital letter or a symbol is used for a unit of measurement,you should take it and the number before it as a word.
B. When used in measurement,the acronym or the symbol and the related number should be taken as a word.
C. When you write an abbreviation or a symbol for a unit of measurement,count it and the preceding number as one word.
A. 如果可能的话,告诉你的读者如果不遵守安全指令会发生什么。
B. 如果必要的话,告诉你的读者如果没有安全指令会发生什么。
C. 如果可能的话,告诉你的读者会发生什么,判断是否未遵守安全指令。
A. 拧紧螺母至足够牢固,而不是用手可以去拧动得动。
B. 拧紧螺母,但要保持足够宽松度,便于用手可以取下它。
C. 要保持螺帽被拧紧,使你的手无法拧松它们。
A. Emergency Lighting is a independent subsystem used to provide illumination in case of primary electrical power failure.
B. Urgency Lights that supply the lights when the major electronic power fails is a separate subsystem.
C. Ambulance Lights is used to supply lights if the main electrical sources malfunctions as an independent subsystem.
A. 注:如果登机软件打包失败,将其补齐。
B. 注:如果随机软件包丢失,将其补齐。
C. 注:如果随机行李丢失,请提供行李牌。
A. Because pressurized air can blow contamination away from the display unit,you should not use it to clean the holes behind the display unit in order to avoid damaging the equipment.
B. Do not use compressed air to clean the holes on the rear of the display unit.Compressed air will push contamination into the display unit.This can cause damage to the equipment.
C. Do not use compressed air to clean the holes behind the display unit,because it can blow contaminants into display unit which may be damaged.
