1、tains no methane 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 billowing smokestack, pushing out carbon dioxide, farm animals passing wind contribute a surprisingly high percen
2、tage of total emissions in some countries. “Fourteen percent of emissions from all sources in Australia are from enteric methane from cattle and sheep,” said Athol Klieve, a senior research scientist with the greensland state government. “And if you look at another country such as New Zealand, which
3、 has got a much higher agricultural base, they are actually up around 50 percent,” 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
4、isolate the bacteria before they can even start to develop a way of transferring it to cattle and sheep. Another group of scientists, meanwhile, have suggested Australians should farm fewer cattle and sheep and just eat more kangaroos. And about 20 percent of health-conscious Australians are believe
5、d to eat the national symbol already. Its low in fat, it s got high protein levels and it is very clean in the sense that basically it is free-range(放养的) animal,” said Peter Ampt of the University of New South Wales institute of environmental studies.28. Scientists intend to put bacteria into cattle
6、 and sheep_.A. to help Australian farmers to earn more moneyB. to prevent them from sending out harmful gases C. so that they can protect Australian ecosystemD. so that they can make full use of special bacteria29. Athol Klieve seems to believe that _.A. farm animals are to blame for greenhouse gase
7、sB. less cattle and sheep are raised in New ZealandC. cattle and sheep produce less carbon dioxideD. New Zealand has the most animals in the world30. The advantages Peter Ampt lists about kangaroos dont include _. A. it is rich in proteinB. it is low in fatC. it is cheaper than beefD. it is cleaner
8、than sheep31. The main idea of the passage is to _.A. discuss a better way to protect the earthB. warn farmers of the danger of animal wasteC. explain the possible solutions to pollutionD. present a recent study on global warmingDWhen you put down your pens at the end of college entrance exam, 12 ha
9、rd years of study will have come to an end. Forget your studies for a while. Its time to enjoy yourselves! There are many ways to celebrate this special month of graduation. You can have photos taken with your classmates and teachers, or dine out together and exchange gifts. High school students in
10、western countries such as the United States and Canada usually have a party to mark their graduation. It is to mark the time when kids turn into young men and women. After the party, teenagers either go to college or find a job. It means they will no longer depend on their parents as before.At the p
11、arty, boys usually dress in dinner jackets and bow ties, though many different types of formal clothes are worn. Girls traditionally wear formal dresses, or dress to shock or be noticed, in shiny or brightly colored materials.Common party activities include dining, dancing, crowning of a ball king a
12、nd queen, and just talking to friends. In some cases, high school students collect funds for their class party through the four years of their high school.High schools in or near large cities may rent big rooms at expensive hotels or, to be unusual, on a pleasure boat. But often costs are cut by simply using the school gym. Students make a lot of efforts to decorate the gym to make the event special. The music played at the party will be the most popular kinds, like rock and hip-hop.Sometimes teachers and parents also go to the party. But others like to go with friends, to whom th
