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[单选题]

Only by keeping down costs will America maintain its（)advantage over other countries.

A.competitive

B.competition

C.competitor

D.contestant

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更多“Only by keeping down costs wil…”相关的问题

第1题

服务员提供夜床服务时，应通报（)。

A.House Keeping

B.May I Come in

C.Turn Down Service

D.Room Service

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第2题

完成下列各选项 A A greenhouse is a building made of glass whi

ch is used for keeping plants warm when the outside temperature is how．In a similar way there are several gases in the atmosphere which trap(捕捉)the heat produced by the sun and prevent it from escaping．These gases are known as“greenhouse gases“，and the way in which they trap heat in the atmosphere is called the “greenhouse effect”．This is not simply air pollution．Most of the main greenhouse gases exist naturally in small amounts in our atmosphere．And without them earth would be 30 degrees colder and human life would not exist．In other words，the greenhouse effect is a natural course which is to some degree helpful to us． The problem is that in the last century and a half．we have been putting too many 0f these gases into the earth’s atmosphere by burning large quantities of coal and oil and by cutting down forests．The rapid increase in greenhouse gases is making the world warmer．The world's temperature has already gone up by half a degree this century，and the sea level has risen by lo centi-metres．If the amount of carbon dioxide(二氧化碳)in the atmosphere doubles，there will probably be a rise in the earth’s temperature of between l and 4 degrees．This may seem a small in—crease，but it would be enough to cause major changes in geography and agriculture．Large areas of the world would be flooded．and some areas would become dry and unable to produce crops．It is important，too，to consider that there may be a delay of about 30 years in the greenhouse effect．This means that we’re probably experiencing only now the effect of the gases put into the atmosphere before the l960s．Since then，our use of these gases has greatly increased． “Greenhouse effect”means________．

A.a natural course which is to some degree helpful to us

B.the way．in which gases are used for keeping plants warm

C.the way“greenhouse gases”trap heat on the earth

D.the whole course in which greenhouse gases prevent heat

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第3题

Which of the following government actions would lead to an increase in aggregate demand？（1

Which of the following government actions would lead to an increase in aggregate demand？

(1) Increasing taxation and keeping government expenditure the same

(2) Decreasing taxation and increasing government expenditure

(3) Decreasing money supply

(4) Decreasing interest rates

A.1 only

B.1 and 3

C.2 and 4 only

D.2, 3 and 4

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第4题

We know very little about the central Africa 200 years ago because______.A．there was nothi

We know very little about the central Africa 200 years ago because______.

A．there was nothing worth Being written down at that time

B．the people there don't pay attention to the importance of keeping a record

C．the written records were perhaps destroyed by a fire

D．the people there did not know how to write

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第5题

The one-year course is only to__________the foundations of good technical trainin

The one-year course is only to__________ the foundations of good technical training.

A． lead to

B． let down

C． come to

D． lay down

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第6题

Why must the entries be posted separately into the ledger and into the statements？A．Becaus

Why must the entries be posted separately into the ledger and into the statements？

A．Because the work must be finished in a very short period of time.

B．Because it is unlikely for the same mistakes to be made in both ledger and statements and people can find the wrong entries without difficulty.

C．Because it is difficult for only one person to do it.

D．Because it is easy for people to discover mistakes by keeping accounts.

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第7题

I must get down （to) （write) the composition. （There) is only 20 minutes （left)A．toB．write

I must get down (to) (write) the composition. (There) is only 20 minutes (left)

A．to

B．write

C．There

D．left

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第8题

—Perhaps we should climb out of the window and jump down? It' s only two floors.

—_________________We' d better wait for the rescue.

A.That' a good idea.

B.No, we can' t do that.

C.I think we will kill ourselves.

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第9题

It is implied but not stated in the passage that______.A．those who have long-term goals wi

It is implied but not stated in the passage that______.

A．those who have long-term goals will succeed

B．writing down the dates may discourage you

C．the goal is only a guide for us to reach our destination

D．everyone should have a goal

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第10题

The main idea of the third paragraph is that______.A．a mature torpedo is capable of produc

The main idea of the third paragraph is that______.

A．a mature torpedo is capable of producing enough electricity to knock down a man

B．the mass of the fish decides the intensity of electric power it generates

C．the strength of shock given by a young electric ray can only light the bulb of a pocket flashlight

D．to make full use of the energy produced by electric fish, suitable wires should be available

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