2011届高考英语阅读推断词义篇复习汇编 - 高考资源网.docVIP

A 词数：275 体裁：科技说明文 难度：4 Australian scientists are trying to give kangaroo-style stomachs to cattle and sheep in a bid to cut the emission of greenhouse gases blamed for global warming. Thanks to special bacteria in their stomachs, kangaroo farts contain no methane（甲烷）and scientists want to transfer that bacteria to cattle and sheep who emit large quantities of the harmful gas. While the usual image of greenhouse gas pollution is a billowing smokestack pushing out carbon dioxide, livestock passing wind contribute a surprisingly high percentage of total emissions in some countries. Fourteen percent of emissions from all sources in Australia is from enteric methane from cattle and sheep, said Athol Klieve, a senior research scientist with the Queensland state government. And if you look at another country such as New Zealand, which has got a much higher agricultural base, theyre actually up around 50 percent, he said. Researchers say the bacteria also makes the digestive process much more efficient and could potentially save millions of dollars in feed costs for farmers. But it will take researchers at least three years to isolate the bacteria, before they can even start to develop a way of transferring it to cattle and sheep. Another group of scientists, meanwhile, has suggested Australians should farm fewer cattle and sheep and just eat more kangaroos. The idea is controversial（争议）, but about 20 percent of health conscious Australians are believed to eat the national symbol already. Its low in fat, its got high protein levels and its very clean in the sense that basically its the ultimate free range animal（散养动物）, said Peter Ampt of the University of New South Waless institute of environmental studies. 56. According to the passage, global warming is now mainly caused by _____ . A. methane B. carbon dioxide C. livestock passing wind D. not mention in this passage 56. D 考查细节理解。A、B、C均是导致全球变暖的原因，但文中并没有提到哪一个是主要原因，因此答案为D文中没有提到。 57. What does the underlined phrase “th