大学视听说3答案解析郑树棠.docx

1、大学视听说3答案解析郑树棠Uint7II. Basic Listening Practice1.ScriptM: Now we have satellite and high-powered microscope, its easy to think we know everything about the world; but we still dont understand EI Nino.W: Right. Scientists all over the world over are even uncertain about the cause of the warm Pacific c

2、urrent that brings storms or droughtthe mysterious EI Nino.Q: Which of the following is true according to the conversation?2. ScriptM: Everyone is talking about environmental problem: acid rain, the greenhouse effect, holes in the ozone layer. We should think positively. What can we do to improve th

3、ings?W:I agree. We could do a lot more to harness the suns energy 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?3. ScriptW:We lived in Beijing some years ago. It was always difficult to keep the house cl

4、ean with wind from the north blowing sand from the desert at us.M: Thats why the Chinese government has been encouraging people to plant trees along the edges of the GobiDesert. Now those trees act as wind barriers.Q: What did the government encourage people to do?4. ScriptM:Many old refrigerators a

5、nd cars are environmental hazards because they contain CFCs that destroy the ozone layer.W:Yes, but government or 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

6、?5. ScriptM:Hey, thats an aerosol spray youre using on your hair! Build a bomb or 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 CFC s. And youd better read a little more. In 2003 the hole in the ozon

7、e layer shrank by 20 percent, so theres no reason to panic.Q: What does the man mean?Keys: 1.B 2.D 3. A 4.A 5.CIII. Listening InTask 1: We should have proper respect for nature!ScriptMartha: Do you think most people in your culture respect nature?Ed: I think so. Ummmore now than before.Martha: What

8、do you think is the most serious environment problem in the world today?Ed: TodayI think damage to the ozone layer is a big problem; and another problem is pollution in big cities and things like that.Martha: How do you learn about environmental problems?Ed: Ummthrough school. A lot of clubs promote

9、 environmental safely, and some TV programs, too. They talk about environmental safely and stuff like that.Martha: Do you think students 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

10、 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 for the environment? UmmId probably say that when people throw away their cigarette butts, they have to throw them into the garbage bin, not just throw them everywhere

11、 because its just littering and I hate that. So they should be fined if they throw them on the floor on the ground.Martha: Thats a good idea. What do you personally do to help protect the environment?Ed: I m so against littering. I never litter. If I see somebody litter, I get really angry. So I alw

12、ays throw my trash into the garbage bin.While being interviewed by Martha, Ed said more people in his culture respect nature ever before. When asked about the most serious environmental problem in the world today, he mentioned the damaged ozone layer and the pollution in big cities.Ed learned about

13、environmental problem at school. A lot of clubsand some TV programs promote environmental safely. He believes that students should learn more about the environment at school. Then they can be more aware of all the problems and prevent more problems from occurring.When asked about a new law he would

14、like to create to help the environment, he said that when people throw away their cigarette butts, they have to throw them in the garbage bin. They should be fined if they throw them on the floor.Personally, Ed is so set against littering that he neverlitters. He always throws his trash into the gar

15、bage bin.Task 2: A Work Qualification TestScriptAccording to a report by Australian researchers, the hole in the ozone layer over Antarctica will probably start closing withinfive years. They say it may be pletely closed within fifty years. The ozone layer protects the Earth from dangerous radiation

16、from the sun. The hole in the ozone layer was discovered over Antarctica almost thirty years ago. 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 year2000. But since then, there has

17、 bee continuous progress made toward the recovery of the ozone layer. Satellite information showed that levels of ozone-destroying gases in theatmosphere 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

18、 of 23 million square kilometers over the last six years.Chlorofluorocarbons, or CFCs, are responsible for destroying part of the ozone layer over Antarctica. CFCs have been widely used since the1930s in cooling devices such as refrigerators and air conditioners. CFCs remain in the atmosphere for ye

19、ars.Government scientist say the level of chlorine in the atmosphere is decreasing because of 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 promoted to cut

20、their use of chlorofluorocarbons in half by the year 2005. They also agreed to an eighty-five percent cut by the year 2oo7.Keys: FTTFTFor Reference1.It was three times the size of Australia.2.They promised to cut their use of CFCs in the half by 2005 and agreed to an 85 percent cut by 2007.Task3: A

21、Mild EI NinoScriptThe EI Nino weather condition has returned. However, official at the United States National Weather Service say EI Nino is weaker than usual this year. EI Nino is a change in the atmosphere over the Pacific Ocean. It happens every four or five years.Normally, water temperatures in

22、the western Pacific Ocean increase near the end of the year. This cause more rainfall in Indonesia, Australia and other nearby place. At the same time, cold ocean water cause less rainfall in the eastern Pacific Ocean, near South America. The opposite happens during EI Nino. Pacific Ocean temperatur

23、es increase nearSouth America, causing unusually high amounts of rainfall there. In contrast, EI Nino causes dry weather in Indonesia and Australia.A strong EI Nino can severely affect the weather all over the world. The last powerful EI Nino was in 1997 and 1998. It caused major floods in many plac

24、es. EI 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 EI Nino this year is good news. Meteorologists say rainfall has been higher than usual in South America. The experts say the effects of E

25、I Nino will begin to show in November in the United States. The northern states may have a warmer winter. But, scientists say EI Nino will not be strong enough to prevent this years powerful storms in the Atlantic Ocean.1.According to the passage, how often does EI Nino happen?2.What normally happen

26、s in the western Pacific Ocean?3.What did the EI Nino in 1997 and 1998 cause?4.What is NOT mentioned as a result of this years EI Nino?5.What is the central idea of the passage?Kes: 1C 2.A3. D 4.B 5.CFor ReferencePacific Ocean temperatures increase near South America, causing unusually high level of

27、 rainfall there. Dry weather results in Australia.IV. Speaking OutMODEL 1 Our globe is in dangerJohn: How is your Grandma getting along during this usually hot weather?Nora: Over the last few years, Granny has been plaining that the hot, humid weather is killing her. She believes the weather has cha

28、nged.John: What she means is the climates long-term conditions; weather refers only to day-to-day conditions.Nora:Yeah, she says summer is hotter, and winter wetter. But I tried to fort her, saying, “Its all in your mind, Granny.”John: Shes right, you know. The greenhouse effect does bring global wa

29、rming and rain.Nora:How can I explain global warming and greenhouse gases to a 97-year-old Granny?John:Tell her the earth now is like a real greenhouse made of glass panels that let in light and trap heat.Nora: Think shell want to know that carbon monoxide from earth makes greenhouse gases?John: Eve

30、rybody should know what cause global warming; otherwise we wont stop it.Nora:Ill tell Granny not to burn any more wood or coal, or to use spray on the hair.John: OK, joke about it, but it wont be so funny when the polar icecaps melt and oceans rise.Now Your TurnSAMPLE DIALOGA:How are you getting alo

31、ng during this usually hot weather?B:Not well at all. Over the last few weeks the hot, humid weather is killing me. I believe the climate has changed.A:Yeah, the summer is hotter, and winter wetter.B:Do you know why all this has happened?A:The greenhouse effects bringglobal warming and rain.B: What

32、do you mean by greenhouse effects?A: The earth is now like a real greenhouse made of glass panels that let light in and trap heat. You know, carbon monoxide from earth is a greenhouse gas.B:I see.Everybody should know what cause global warming; otherwise we wont stop it.A:The important thing is that human beings should take steps to reduce global warming.B: What can we do then? Perhaps we should not burn any more wood or coal.A:Right. Also we should t