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Portable Oxygen Bottle是指()

A.便携式应急定位发射器

B.防护式呼吸装置

C.干粉化学灭火瓶

D.便携式氧气瓶

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第1题
Tracy works at home.She doesn't need a portable computer, So she uses a___.

A.memory

B.keyboard

C.desktop

D.laptop

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第2题
When their black and white TV broke down,____ (She Is an Unwilling Tool of Middleclass

A.they had it repaired for $112

B.they moved it out to their new house

C.they got a color portable

D.they bought a new one

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第3题
化学需氧量(Chemical Oxygen Demand) 名词解释

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第4题
While testing a cargo tank,your oxygen indicator reads 25% oxygen in the tank. You would t
hen ______.

A.enter the tank safely

B.suspect the accuracy of the reading

C.ventilate the tank

D.test for nitrogen

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第5题
Before operating a non-oceangoing ship greater than 100 gross tons it must have a fixed pi
ping system to discharge oily mixtures ashore. This system must include______.

A.approved oily-water separating equipment

B.a fixed or portable containment system at the shore connection

C.a spare pump in case the main pump is inoperative

D.at least one outlet accessible from the weather deck

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第6题
What is said about the over 100 aircraft incidents in the past 15 years?A.They may have be

What is said about the over 100 aircraft incidents in the past 15 years?

A.They may have been caused by the damage to the radio systems.

B.They may have taken place during take - off and landing.

C.They were proved to have been caused by the passengers' portable computers.

D.They were suspected to have resulted from electromagnetic interference.

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第7题
化学需氧量( Chemical Oxygen Demand.简称COD)(名词解释)
化学需氧量(Chemical Oxygen Demand.简称COD)(名词解释)

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第8题
You are on a cargo vessel carrying toluol in bulk in portable tanks. Which is a requiremen
t for pumping the toluol?

A.Hose connections to the tank must be made with a minimum of three bolts

B.There must be water pressure on the fire main

C.You must shut down if another vessel comes alongside

D.If transferring at anchor,you must display a red flag by day and a red light at night

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第9题
A vessel in ocean service that does not have an approved means of processing oily bilge sl
ops or oily ballast must have ______.

A.a fixed piping system for ballast discharge to a reception facility

B.a discharge outlet for the ballast system on each side of the weather deck

C.one portable adapter for a shore connection to the ballast line

D.All of the above

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第10题
Green plants take in carbon dioxide and give off oxygen in a food-making process called ph
otosynthesis.

A.donate

B.check

C.withhold

D.release

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第11题
What is the best instrument for establishing a safe working area before welding in a confi
ned space?

A.An oxygen indicator

B.A combustible gas indicator

C.A combination combustible gas and oxygen indicator

D.A flame safety lamp

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