18.In face of global warming,much effort has been focused on reducing greenhouse gas emissions through a variety of strategies.But while much of the research and innovation has concentrated on finding less-polluting energy alternatives,it may be decades before clean technologies like wind and solar meet a significant portion of our energy needs.
In the meantime,the amount of CO2 in the air is rapidly approaching the limits proposed by the Intergovernmental Panel on Climate Change (IPCC)."As long as we're consuming fossil fuels,we're putting out CO2,"says Klaus Lackner,a geophysicist at Columbia University,"We cannot let the CO2 in the atmosphere rise indefinitely."
That sense of urgency has increased interest in capturing and storing CO2,which the IPCC says could provide the more than 50% reduction in emissions needed to reduce global warming."We see the potential for capture and storage to play an integral (基本的) role in reducing emissions,"says Kim Corley,Shell's senior advisor of CO2 and environmental affairs.That forward thinking strategy is gaining support.The U.S.Department of Energy recently proposed putting 1billionintoanew2.4billion coal-burning energy plant.The plant's carbon-capture technologies would serve as a pilot project for other new coal-burning plants.
But what do you do with the gas once you've captured it?One option is to put it to new uses.Dakota Gasification of North Dakota captures CO2 at a plant that converts (轉(zhuǎn)換) coal into synthetic(合成的)natural gas.It then ships the gas 200miles by pipeline to Canada,where it is pumped underground in oil recovery operations.In the Netherlands,Shell delivers CO2 to farmers who pipe it into their greenhouses,increasing their production of fruits and vegetables.
However,scientists say that the scale of CO2 emissions will require vast amounts of long-term storage.Some propose storing the CO2 in coal mines or liquid storage in the ocean,Shell favors storing CO2 in deep geological structures such as saline (鹽的) formations and exhausted oil and gas fields that exist throughout the world.

67.What does the author intend to tell readers?C
A.How to find more oil and natural gases.B.How to reduce greenhouse gas emissions.
C.How to deal with the greenhouse gas creatively.
D.How to make good use of solar and wind energy.
68.According to the passage,the following statements are true EXCEPT thatB.
A.the idea of capturing and storing CO2 is supported by the American government
B.it is widely accepted that the CO2 captured should be stored in deep geological structures
C.capturing and storing CO2 is intended to handle the problem with global warming
D.long-term storage of CO2 is no easy job because of the scale of CO2emissions
69.By using CO2,Dutch farmers have been able toA.
A.increase their production of fruits and vegetables  B.convert coal into synthetic natural gas
C.pump it underground in oil recovery operations  D.make exhausted oil and gas fields productive
70.How would you understand the underlined part in the third paragraph?C
A.It means a project training new pilots who will serve the new strategy.
B.It refers to the coal-burning energy plant that U.S government sponsors.
C.It implies the carbon-capture technologies will be popular once successful.
D.It shows the new idea of reduction of CO2 emissions needs a large sum of investment.

分析 本文是一篇科教類閱讀,屬于說明文,面對全球變暖,很多努力都集中在通過各種策略減少溫室氣體排放.不過,雖然很多研究和創(chuàng)新都集中在尋找較環(huán)保的替代能源,這可能是幾十年的清潔能源技術(shù),如風(fēng)力和太陽能滿足我們的能源需求顯著部分之前.本文以此展開,主要講述了如何處理溫室氣體.

解答 67.C.主旨大意題.根據(jù)第一段中"much effort has been focused on reducing greenhouse gas emissions through a variety of strategies"可知本文主要講述如何處理溫室氣體,故答案為C項(xiàng).
68.B.細(xì)節(jié)理解題.由最后一段"Some propose storing the CO2 in coal mines or liquid storage in the ocean,Shell favors storing CO2 in deep geological structures such as saline (鹽的) formations and exhausted oil and gas fields that exist throughout the world."可知這種觀點(diǎn)并不是被廣泛接受的,故答案為B項(xiàng).
69.A.細(xì)節(jié)理解題.根據(jù)第四段最后一句"Netherlands,Shell delivers CO2 to farmers who pipe it into their greenhouses,increasing their production of fruits and vegetables."可知,通過使用二氧化碳,荷蘭農(nóng)民能夠增加水果和蔬菜的產(chǎn)量.故答案為A項(xiàng).
70.C.句意理解題.本句意為這項(xiàng)技術(shù)獲得成功的話,對于其他一些工廠將會是一個試點(diǎn)工程,如成功的話,其他工廠肯定會效仿.故答案為C項(xiàng)

點(diǎn)評 本文是一篇科教類閱讀,題目涉及多道細(xì)節(jié)理解題,句意理解題,主旨大意題.做題時(shí)學(xué)生應(yīng)仔細(xì)閱讀原文,把握文章主要內(nèi)容,聯(lián)系文章上下文內(nèi)容并結(jié)合所給選項(xiàng)含義,從中選出正確答案,一定要做到有理有據(jù),切忌胡亂猜測.

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