Question

8．Rooftops covered with plants-called"green roofs"-could help fight global warming，scientists now suggest．
Green roofs are growing more popular in cities，with the number of green roofs increasing in the United States．In Germany，widely considered the leader in green roofing，some 12 percent of all flat roofs are green，with the German green roof industry growing 10 to 15 percent annually．
These roofs can reduce heating and air conditioning costs，with a roughly 10 percent reduction in natural gas usage and a 2 percent drop in electricity use for a typical building．Moreover，green roofs last two to three times longer than standard roofs．They also store storm water，which could otherwise exacerbate （加�。ゝlooding．"They can also bring in birds and butterflies，help improve biodiversity（多樣性），"Rowe said．In addition to taking in pollution and noise，the plants in green roofs naturally absorb carbon dioxide，the leading greenhouse gas behind global warming．However，nobody had measured the potential effect of green roofs on carbon dioxide levels until now．
Scientists at Michigan State University found that replacing traditional roofing materials with green roofs in an urban area the size of Detroit，with a population of about one million，would take in more than 55，000 tons of carbon．That is roughly similar to getting rid of a year's worth of carbon dioxide sent out by 10，000 mid-sized SUVs and trucks．
The challenges green roofs now face in the United States are something about policy and costs．"The government should not necessarily mandate（強(qiáng)制執(zhí)行） them，but it can provide support for them，just as they do in Germany and elsewhere，"Rowe told LiveScience．"And green roofs are more expensive，but only initially．Over time，they're cheaper once you consider their benefits energy-wise．It takes about 11 to 14 years to break even（不贏不虧）．"
53．Which of the following is NOT true？B
A．Green roofs can take in the leading greenhouse gas behind global warming．
B．It is easier for green roofs to break than standard roofs．
C．A building with a green roof takes less energy to be heated．
D．Green roofs are of higher building cost．
54．We can learn from the passage thatD．
A．Rowe is not optimistic about the future of green roofs
B．Germany has made it a rule to build green roofs
C．The United States is widely considered the leader in green roofing
D．Green roofs can provide habitats for birds and butterflies
55．The underlined word in the last paragraph is closest in meaning toB．
A．a(chǎn)t times     B．a(chǎn)t first    C．a(chǎn)t present        D．a(chǎn)t last
56．Which of the following can be the best title？C
A．Standard Roofs and Green Roofs
B．Green Roofs Are Growing More Popular
C．Green Roofs Help Control Global Warming，
D．Advantages of Green Roofs．

Answer 1

分析 文章大意：本文講了綠色屋頂?shù)陌l(fā)展近況和前景，以及為我們生活環(huán)境帶來(lái)的好處．

解答 53．B  細(xì)節(jié)理解題．本題可用排除法．根據(jù)文章第三段倒數(shù)第二句In addition to taking in pollution and noise，the plants in green roofs naturally absorb carbon dioxide，the leading greenhouse gas behind global warming．可知A項(xiàng)表述正確；根據(jù)文章第三段第一句These roofs can reduce heating and air conditioning costs，with a roughly 10 percent reduction in natural gas usage and a 2 percent drop in electricity use for a typical building可知，C項(xiàng)表述正確．根據(jù)文章最后一段中的．"And green roofs are more expensive…"可知綠色房頂?shù)某杀鹃_(kāi)始會(huì)很高，因此D項(xiàng)表述正確．而根據(jù)文章第三段中的Moreover，green roofs last two to three times longer than standard roofs可知綠色房頂?shù)氖褂脡勖�是�?biāo)準(zhǔn)房頂?shù)亩�至三倍，因此B項(xiàng)表述錯(cuò)誤，根據(jù)題干要求答案選B．
54．D 推理判斷題．根據(jù)文章最后一段中的．"And green roofs are more expensive，but only initially．Over time，they're cheaper once you consider their benefits energy-wise．可知Rowe對(duì)綠色房頂?shù)奈磥?lái)是樂(lè)觀的，因此A項(xiàng)錯(cuò)誤；根據(jù)文章最后一段中的The government should not necessarily mandate（強(qiáng)制執(zhí)行） them，but it can provide support for them，just as they do in Germany and elsewhere，可知德國(guó)政府并沒(méi)有強(qiáng)制執(zhí)行，因此B項(xiàng)錯(cuò)誤；根據(jù)文章最后一段The challenges green roofs now face in the United States are something about policy and costs可知美國(guó)政府政策方面是很大的挑戰(zhàn)，因此排除C項(xiàng)．根據(jù)文章第三段They can also bring in birds and butterflies，help improve biodiversity（多樣性）可知綠色房頂可以給鳥(niǎo)類和蝴蝶提供棲息地，所以答案選D．
55．B 詞義猜測(cè)題．根據(jù)文章最后一段中的And green roofs are more expensive，but only initially．Over time，they're cheaper once you consider their benefits energy-wise可知開(kāi)始的時(shí)候綠色房頂會(huì)很貴，但是經(jīng)過(guò)一段時(shí)間，一旦你考慮他們的益處，他們就會(huì)很便宜，由此可判斷initially意思是at first"開(kāi)始，首先"．a(chǎn)t times"時(shí)常"，at present"目前，現(xiàn)在"，at last"最后，終于"，因此根據(jù)語(yǔ)境判斷答案選B．
56．C 主旨大意題．通過(guò)整篇文章分析，本文主要講了綠色房頂可以吸收二氧化碳等溫室氣體，這有利于幫助我們控制全球變暖，因此答案選C．

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