新视野大学英语3听力原文unit7.docx
《新视野大学英语3听力原文unit7.docx》由会员分享,可在线阅读,更多相关《新视野大学英语3听力原文unit7.docx(5页珍藏版)》请在得力文库 - 分享文档赚钱的网站上搜索。
1、M: Now we have satellites and high-powered microscopes, its easy to think we know everything about the world; but we still dont understand El Nino.W: Right. Scientists all over the world are even uncertain about the cause of the warm Pacific current that brings storms or drought - the mysterious El
2、Nino.Q: Which of the following is true according to the conversation?M: Everyone is talking about environmental problems: acid rain, the greenhouse effect, holes in the ozone layer. We should think positively. What can we do to improve things?W: I agree. We could do a lot more to harness the suns en
3、ergy for heating and lighting in our homes. In Japan 43,000 solar roofs were installed in 2002.Q: How do the man and the woman view the environment?W: We lived in Beijing some years ago. It was always difficult to keep the house clean with the wind from the north blowing sand from the desert at us.M
4、: Thats why the Chinese government has been encouraging people to plant trees along the edges of the Gobi Desert. Now those trees act as wind barriers.Q: What did the government encourage people to do?M: Many old refrigerators and cars are environmental hazards because they contain CFCs that destroy
5、 the ozone layer.W: Yes, but government organizations are helping people to safely dispose of old refrigerators or, in the case of cars, to upgrade their air conditioning.Q: What are government departments helping people to do?M: Hey, thats an aerosol spray youre using on your hair! Build a bomb or
6、set fire to the apartment to kill us quickly instead of making holes in the ozone, so we die of cancer.W: Cool it, man. This spray doesnt contain CFCs. And youd better read a little more. In 2003 the hole in the ozone layer shrank by 20 percent, so theres no reason to panic.Q: What does the man mean
7、?We should have proper respect for nature!Martha: Do you think most people in your culture respect nature?Ed: I think so. Umm. more now than before.Martha: What do you think is the most serious environmental problem in the world today?Ed: Today. I think damage to the ozone layer is a big problem; an
8、d another problem is pollution in big cities and things like that.Martha: How do you learn about environmental problems?Ed: Umm. through school. A lot of clubs promote environmental safety, and some TV programs, too. They talk about environmental safety and stuff like that.Martha: Do you think stude
9、nts should learn more about the environment at school?Ed: I think so. So, as they grow older, they can be more aware of all the problems that are going on. And also to prevent more problems from occurring.Martha: If you could create a new law to help the environment, what would it be?Ed: A new law f
10、or the environment? Umm. Id probably say that when people throw away their cigarette butts, they have to throw them into the garbage bin, not just throw them everywhere because its just littering and I hate that. So they should be fined if they throw them on the floor or on the ground.Martha: Thats
11、a good idea. What do you personally do to help protect the environment?Ed: Im so against littering. I never litter. If I see somebody litter, I get really angry. So I always throw my trash into the garbage bin.*The Smaller Hole in the Ozone LayerAccording to a report by Australian researchers, the h
12、ole in the ozone layer over Antarctica will probably start closing within five years. They say it may be completely closed within fifty years. The ozone layer protects the Earth from dangerous radiation from the sun. The hole in the ozone layer was discovered over Antarctica almost thirty years ago.
13、 At the time, it was three times the size of Australia.The report found that ozone-destroying gases in the upper atmosphere were at or near their highest levels in the year 2000. But since then, there has been continuous progress made toward the recovery of the ozone layer. Satellite information sho
14、wed that levels of ozone-destroying gases in the atmosphere are slowly decreasing. At its largest this year, the ozone hole covered more than 15 million square kilometers. That is down from a yearly average of 23 million square kilometers over the last six years.Chlorofluorocarbons, or CFCs, are res
15、ponsible for destroying part of the ozone layer over Antarctica. CFCs have been widely used since the 1930s in cooling devices such as refrigerators and air conditioners. CFCs remain in the atmosphere for years.Government scientists say the level of chlorine in the atmosphere is decreasing because o
16、f restrictions on the use of chlorofluorocarbons. The chemicals were restricted under an international agreement called the Montreal Protocol in 1987. Under the Protocol, developing countries promised to cut their use of chlorofluorocarbons in half by the year 2(X)5. They also agreed to an eighty-fi
17、ve percent cut by the year 2007.A Mild El NinoThe El Nino weather condition has returned. However, officials at the United States National Weather Service say El Nino is weaker than usual this year. El Nino is a change in the atmosphere over the Pacific Ocean. It happens every four to five years.Nor
18、mally, water temperatures in the western Pacific Ocean increase near the end of the year. This causes more rainfall in Indonesia, Australia and other nearby places. At the same time, cold ocean water causes less rainfall in the eastern Pacific Ocean, near South America. The opposite happens during E
19、l Nino. Pacific Ocean temperatures increase near South America, causing unusually high amounts of rainfall there. In contrast, El Nino causes dry weather in Indonesia and Australia.A strong El Nino can severely affect the weather all over the world. The last powerful El Nino was in 1997 and 1998. It
20、 caused major floods in many places. El Nino also led to extremely dry weather in some other areas. Reports say the weather caused the deaths of about 24,000 people.So experts say having a weaker El Nino this year is good news. Meteorologists say rainfall has been higher than usual in South America.
21、 The experts say the effects of El Nino will begin to show in November in the United States. The northern states may have a warmer winter. But, scientists say El Nino will not be strong enough to prevent this years powerful storms in the Atlantic Ocean.nThe Environment and the DevelopmentLi: Hi, Pro
22、fessor Wang, Im Li Lin, a correspondent from the University Newspaper. The staff and students here are getting more and more interested in the relationship between the environment and development. What do you think is the most serious environmental problem at present? What measures should we adopt t
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 新视野 大学 英语 听力 原文 unit7
限制150内