大学英语听力教学课件第三册答案~主编张民伦.doc

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1、|英语听力教程 3答案与听力材料 呵呵.考试一路顺风.UNIT 1A.B. Keys:Part I Getting ready1: burning of the forests/tree removal (deforestation)/reduction of the worlds rain forests2: global warming/greenhouse effect/emissions of CO2Part II The Earth at risk (I)A. Keys:1. a. More people-?more firewood-?fewer treesb. More dome

2、stic animals-?more plants-?fewer available plants a, b-? More desert-?move south-?desrtt expanding south-?no grass2. Growing crops stabilize soil, without them the top soil just blows away. But if there isnt enough rain the crops dont grow. 3. People try to grow food to support themselves or to crea

3、te ranches where cattle can be raised, or to get hardwood for export, |or to make way for an iron ore mine B. Keys:1: Sahara Desert2: North America life getting better for captive dolphins4: natural behabior patterns-altered 5: suffering from fractured skulls, ribs or jaws6: cant learn from animals

4、in the wild how they operate, breed, what they need, etc.Part IV More about the topic: Birds-A Source of WealthKeys:1： 9300 2： Habitat 3： warmer climates 4： 300 different species5： colder climates 6： habitat alteration 7： esthetic value 8： Birds populationPart V Do you know?Keys:1: one and one-half

5、million 2: 20 times3: 100 4: 40000 5: 65 million6: 3500 7: 2 million square miles 8: 3%9: 200 animal species 10: 100011: a third 12: two-thirds 13: three-quartersUnit 3 El Nino? La Nina?Part I|D. warmer/ green house effect / sea levels/ climate zonesAs 1998 ends and people look forward to the last y

6、ear of the century, the World Almanac spoke with experts about what comes next. Almanac editorial director says the experts believe the next century will bring lots of changes. Warm, of course, that our climate is going to continue getting warmer. Thats the subject, by the way, of another new articl

7、e on the 1999 World Almanac. The greenhouse effect, exactly what causes it, and what steps to be taken to, perhaps to alleviate global warmings. Ive seen recently that 1998 is going to go down as the warmest year ever on record. And so thats going to be a major issue of the next century, and possibl

8、e tremendous consequences of the global warmings, whether it is rising sea levels affecting the coastal areas; changes in climate zones affecting what crops can be grown, and in what regions. This is potentially a very significant trend to be watched. E. Cyclone: North or south of equator / Typhoon:

9、/ Hurricane: Eastern PacificMajor ocean storms in the northern part of the world usually develop in late summer or autumn over waters near the equator. They are known by several different names. Scientists call these storms cyclones when they happen just north or south of the equator in the |Indian

10、Ocean. In the western Pacific Ocean or the China Sea, these storms are called typhoons. In the eastern Pacific and Atlantic Ocean, they are called hurricanes. Part IIA. Outline 1. A. weather pattern/ global climateB. 1. twice a decade 2. 12-18 months C. 1. warmer weather/ 2. wetter than usual/ drier

11、 D. the decline of winds II. 1. droughtsB. a cyclic weather pattern/ about twice a decade/ wetter/ drier/ cold water away from South Americas west/ to expand eastward toward the Americas / move eastward too/ the weather around the world/ droughts/ rains and flooding/ on the South American fishing in

12、dustry/ to become depletive/ the strength of it/ Part III Lick ObservatoryB. location: an hours drive/ summit/ Origin of the name: a wealthy businessmanSize: one meter diameter/ secondTime: 1888Present function: research/ an educational toolC. way of observation: human eyes; in the cold/ TV screen|G

13、ains and losses: Romance/ the sky/ efficiency/ reality/ universeQuestions: 1. Because lick Observatory is near “Silicon Valley”, a region of the states high-technology.2. Because Lick Observatory was built on his estate and he was buried at the base of the telescope at this won request. 3. By using

14、the 19th century telescope, you have a feeling of romance with direct viewing with the human eyes. By sing the modern devices, you lose that romance but gain the efficiency. Thats an exchange. Part IV. The national climatic Data Center. A. OutlineI. A. 1951 B. headquarters C. satellites, radar, sola

15、r radiation system, airplanes, shipsII. B. collecting weather records from around the world D. publications about earth environment. E. requests fro information from all over the world. B. questions. 1. The Department of Defense, the National Weather Service, the coastguard2. The office has written

16、weather observations made by early American diplomat Benjamin Franklin and by the third President of |the U.S.3. You can get the information by computer, microfilm and telephone4. American cities. Another publication has monthly reports from 1500 observation stations around the world. 5.The center h

17、ad more than 900,000 requests from government officials, business owners, Unit 4 Reports on Disasters & AccidentsPart I. 1. firebomb/ shopping/ several / 2. 1,000 tornadoes3. car ferry/ taken over/ Green Action Front4. South Korea/ 270/ thousands5. robbed/ 5/ lunchtime/ 10,0006. hurricane/ 100/ twenty/ 1007. Hijacked/ TuesdayPart II. Hurricanes & tornadoesA. 1. a storm 2. about 2000 3. the winds were up to 75 miles an hour 4. the Indian army 5. destroyed/ links / collapsed 6. more than 40 people 7. over 100,000 people