题目内容
4.Australian scientists are trying to give kangaroo-style stomachs to cattle and sheep in order to cut the greenhouse gases they send out,which are thought to be responsible for global warming.Thanks to special bacteria in their stomachs,kangaroo flatulence(肠胃气胀)contains no methane(甲烷)and scientists want to transfer that bacteria to cattle and sheep who produce large quantities of the harmful gas.
While the usual image of greenhouse gas pollution is a huge chimney pushing out carbon dioxide,animals at home contribute a surprisingly high percentage of total emissions in some countries."Fourteen percent of emissions from all sources in Australia is from methane from cattle and sheep,"said Athol Kleve,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,they're actually up around 50percent,"he said.
Researchers say the bacteria also make 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 (分离) 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.People are still arguing about this,but about 20percent of health-conscious Australians are believed to eat the national symbol already."It's low in fat,it's got high protein levels and it's very clean in the sense that basically it's the free-range (放养的) animal,"said Peter Amp of the University of New South Wales's institute of environmental studies.
28.Scientists try to give kangaroo-style stomachs to cattle and sheep toB.
A.help them fight against different diseases.
B.reduce the amount of greenhouse gases.
C.get rid of the bacteria in their stomachs.
D.protect them from quantities of harmful gas.
29.The advantage of transferring the bacteria to cattle and sheep is thatC.
A.it will take the researchers a long time.
B.cattle and sheep will eat more than usual.
C.it will help the farmers to save money.
D.the bacteria will make them grow quickly.
30.From this passage we can infer thatA.
A.scientists still don't know how to transfer the bacteria to cattle and sheep.
B.people in Australia depend on kangaroos for food at the present time.
C.14% of the greenhouse gases in New Zealand is from cattle and sheep.
D.nobody in Australia will be allowed to farm cattle and sheep in the future.
分析 文章主要是介绍了一项最近关于温室气体排放的研究.为了减少导致全球变暖的温室气体的排放,澳大利亚科学家目前正在想办法将牛羊胃变成袋鼠式的胃.袋鼠胃中有一种特殊的细菌能使其放的屁中不含有甲烷.科学家想将这种细菌移至牛羊的胃中,以抑制它们所排放的大量有害气体.另一组科学家建议澳大利亚人应少养牛羊,多吃袋鼠肉.
解答 28-30.BCA
28题答案:B考查推理判断.从文章第一﹑二自然段"为了减少导致全球变暖的温室气体的排放,澳大利亚科学家目前正在想办法将牛羊胃变成袋鼠式的胃.袋鼠胃中有一种特殊的细菌能使其放的屁中不含有甲烷.科学家想将这种细菌移至牛羊的胃中,以抑制它们所排放的大量有害气体."可推断得知B选项为正确答案.
29题答案:C考查细节推理,根据文章倒数第二段的Researchers say the bacteria also make the digestive process much more efficient and could potentially save millions of dollars in feed costs for farmers…before they can even start to develop a way of transferring it( bacteria)to cattle and sheep.研究人员说细菌使消化过程更加有效而且能潜在地为农民的喂养成本节省数以百万计美元…在他们开始研究一种将这种细菌植入到牛和羊身上之前.可知本题答案为C选项.
30题答案:A考查细节推理,根据文章倒数第三段的But it will take researchers at least three years to isolate (分离) the bacteria,before they can even start to develop a way of transferring it to cattle and sheep.但是甚至在他们开始研究将这种细菌植入到牛和羊身上之前研究者还要至少花费三年的时间来分离这种细菌.可知目前科学家还不知道如何将这种细菌植入到牛和羊身上,故本题答案为A选项.
点评 本文是一篇科教类阅读,题目涉及多道细节理解题,做题时结合原文和题目有针对 性找出相关语句进行仔细分析,结合选项选出正确答案.推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案.
The number of overseas travelers to Beijing grew after the city hosted the 2008Olympics until 2012,when it saw a 3.8% (51)B,followed by the further drop last year.The unexpected drop in 2013came (52)D new policies introduced in a(n) (53)Ato support China's tourism industry.But only 14,000tourists (54)C the visa-free stopover,according to the Beijing General Station of Exit and Entry Frontier Inspection,well short of the 20,000target officials had (55)C predicted.
Jiang Yiyi,deputy director of the Institute of International Tourism at the China Tourism Academy,(56)Bpart of the drop-off in foreign tourists to the strengthening yuan.
In 2013,the yuan increased almost 3% against the U.S.dollar,making"Beijing a more expensive (57)A than in the past",Jiang Yiyi noted."At the same time,"she said,"other countries have seen their tourist numbers grow as the currencies(货币) (58)D.While RMB is on the rise,currencies from some of China's(59)A for tourism,such as Japan,are depreciating(贬值),meaning travel to some other Asian countries has been getting cheaper while travel to China is becoming more expensive,"Jiang Yiyi said.In 2013,the Japanese yen fell 21% against the U.S.dollar,(60)B 10million overseas tourists.
The Beijing Tourism Development Commission noted that the country's battle with pollution is another(61)C cities face in attracting overseas tourists.
Heavy air pollution from Beijing to Shanghai,where pollution levels went off the charts in December,(62)Ddon't do much to help attract tourists.China's tourism officials are expecting to (63)B the trend of declining overseas visitors in 2014-possible,experts say,if it (64)A its outdated tour packages and lowers ticket prices.
Jiang Yiyi at the China Tourism Academy suggests China adopt a long-term national plan to (65)D the country's image and investment in overseas tourism to attract more visitors.
51.A.growth | B.decline | C.change | D.influence |
52.A.in addition to | B.by means of | C.as a result of | D.in spite of |
53.A.attempt | B.agreement | C.hurry | D.mood |
54.A.got familiar with | B.came up with | C.took advantage of | D.put emphasis on |
55.A.fortunately | B.frequently | C.previously | D.occasionally |
56.A.devoted | B.owed | C.attached | D.exposed |
57.A.destination | B.tourism | C.authority | D.association |
58.A.reform | B.collapse | C.stabilize | D.weaken |
59.A.competitors | B.supporters | C.investors | D.reminders |
60.A.inspiring | B.attracting | C.disappointing | D.embarrassing |
61.A.opportunity | B.situation | C.obstacle | D.alternative |
62.A.relevantly | B.approximately | C.dramatically | D.certainly |
63.A.set | B.reverse | C.confirm | D.follow |
64.A.revises | B.sells | C.excludes | D.demonstrates |
65.A.create | B.keep | C.damage | D.improve |