分析 文章大意:本文讲了绿色屋顶的发展近况和前景,以及为我们生活环境带来的好处.
解答 53.B 细节理解题.本题可用排除法.根据文章第三段倒数第二句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项表述正确;根据文章第三段第一句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项表述正确.根据文章最后一段中的."And green roofs are more expensive…"可知绿色房顶的成本开始会很高,因此D项表述正确.而根据文章第三段中的Moreover,green roofs last two to three times longer than standard roofs可知绿色房顶的使用寿命是标准房顶的二至三倍,因此B项表述错误,根据题干要求答案选B.
54.D 推理判断题.根据文章最后一段中的."And green roofs are more expensive,but only initially.Over time,they're cheaper once you consider their benefits energy-wise.可知Rowe对绿色房顶的未来是乐观的,因此A项错误;根据文章最后一段中的The government should not necessarily mandate(强制执行) them,but it can provide support for them,just as they do in Germany and elsewhere,可知德国政府并没有强制执行,因此B项错误;根据文章最后一段The challenges green roofs now face in the United States are something about policy and costs可知美国政府政策方面是很大的挑战,因此排除C项.根据文章第三段They can also bring in birds and butterflies,help improve biodiversity(多样性)可知绿色房顶可以给鸟类和蝴蝶提供栖息地,所以答案选D.
55.B 词义猜测题.根据文章最后一段中的And green roofs are more expensive,but only initially.Over time,they're cheaper once you consider their benefits energy-wise可知开始的时候绿色房顶会很贵,但是经过一段时间,一旦你考虑他们的益处,他们就会很便宜,由此可判断initially意思是at first"开始,首先".at times"时常",at present"目前,现在",at last"最后,终于",因此根据语境判断答案选B.
56.C 主旨大意题.通过整篇文章分析,本文主要讲了绿色房顶可以吸收二氧化碳等温室气体,这有利于帮助我们控制全球变暖,因此答案选C.
点评 本题是环保健康类题材的阅读表达,这类题是高考常考的内容,它注重考查考生对文章整体把握能力,要求考生在通读全文的基础上结合题目,锁定文章信息,确定答案.
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