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[主观题]

Why do almost one half of all Americans have to pay experts？[A] Because the list of

Why do almost one half of all Americans have to pay experts？

[A] Because the list of taxes seems endless.

[B] Because they would rather spend their time and energy elsewhere.

[C] Because they find their knowledge about taxes is so limited that they are unable to write tax report all by themselves.

[D] Because paying experts to prepare their tax report and asking for tax advice have become very popular.

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更多“Why do almost one half of all …”相关的问题

第1题

The term "pour point" is defined as the lowest temperature at which lubricating oils will

flow _____.

A.rapidly

B.by gravity

C.through a standard orifice at a specified temperature

D.at a rate of 60cc per second

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第2题

Although lube oils used in the main lubricating service systems should have a relatively h

igh flash point to avoid ignition, they can create smoke and fire hazards when they _____.

A.are exposed to a vacuum

B.come in contact with extremely hot surfaces

C.are reduced in temperature to just above the pour point

D.become extremely agitated or aerated

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第3题

Both fuel oils and lubricating oils require （) before passing to the engine.A.pressureB.h

Both fuel oils and lubricating oils require () before passing to the engine.

A.pressure

B.heated

C.treatment

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第4题

_____ fuel oils _____ lubricating oils require treatment before passing to the engine.A.Bo

_____ fuel oils _____ lubricating oils require treatment before passing to the engine.

A.Both/and

B.Neither/nor

C.Either/or

D.Both/or

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第5题

An important consideration in selecting a lubricating oil for use in a refrigeration compr

essor is for the oil to _____

A.have a high viscosity index

B.mix readily with refrigerant

C.have a high freezing point

D.have a low pour point

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第6题

A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must

have a cylinder oil having a ________.

A.low TBN value

B.high alkaline reserve

C.low flash point

D.high pour point

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第7题

Which lubricating oil additive is used in diesel engines to reduce the tendency（倾向)for s

Which lubricating oil additive is used in diesel engines to reduce the tendency(倾向)for sludge and varnish to form on the engine parts？

A.Flash point improvers

B.Pour point improvers

C.Inhibitors

D.Foam suppressors(抑制物)

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第8题

The ability of lubricating oils to resist viscosity changes during temperature changes is

indicated by the ____.

A.American Petroleum

B.Institute number viscosity index number

C.Seconds Saybolt Furol number

D.Seconds Saybolt Universal number

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第9题

Which characteristic or condition will have the greatest effect on increasing a hydraulic

oils viscosity？

A.Pour point

B.Cloud point

C.Vacuum

D.Pressure

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第10题

To receive oil residues from the purification of fuel and lubricating oils in the machiner

y spaces, what kind of tank(s) should be provided on board？

A.bilge tank

B.sludge tank

C.overflow tank

D.oil collecting tank

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