1、UNIT1 Part I Getting readyB. Keys:1: burning of the forests/tree removal (deforestation)/reduction of the worldsrain 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 domestic animals-?more plants-?few
2、er 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 create ranches where cattle can be
3、 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 in the wild how they operate, b
4、reed, 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 million 2: 20 times3: 100 4: 40
5、000 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 ID. warmer/ green house effect / sea levels/ climate zonesPart IIA. Outline 1. A. weather pattern/ global climateB. 1. twice a decade 2. 12-
6、18 months C. 1. warmer weather/ 2. wetter than usual/ drier 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/ dro
7、ughts/ rains and flooding/ on theSouth American fishing industry/ 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
8、. way of observation: human eyes; in the cold/ TV screenGains 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 th
9、e base of the telescope at this won request. 3. By using 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. Out
10、lineI. A. 1951 B. headquarters C. satellites, radar, solar 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
11、Weather Service, the coastguard2. The office has written 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 15
12、00 observation stations around the world. 5. The center had more than 900,000 requests from government officials, business owners, weather researchers and the general public last year. Part V Do you know? Meaning: little girlTime: the western coast of South America / The Pacific coast of Peru and Ec
13、uadorTime: winter monthsDuration: one to two years. Evidence: the eastern Pacific oceanImpacts: those of EL Nino/ drier than normal and others wetter.Unit 4 Reports on Disasters depressing; The best word: bleak Boring/ flavor$ taste/ enjoy itSnobbish;/ alive/ on fireCindy Cloudy/ sunshine Dull, / sw
14、eets Difficult/ reserved relaxedUsha Changeable/ OK Healthy/ bland Reserved/ friendly FastSpiro Depressing / long; pleasant All right/ limited Friendly sincere Awful;/ tiringB. 1. It must be tasty and full of flavor2. Spring and autumn3. Because the city life is fast4. for seven years5. there is a w
15、ider selection of dishes in Greek food. 6. Usha is very good at making friends.Part IV Native peoples of Alaska1. A. 1 sea 2 fish 3 4 reindeerB 1 frame houses 2 hutsC 1 hunting 2. carving II. A related/ different B. 1 the sea 2 fishing boats 3 working in III. Indians A. the interior 1. Canada 2 fishing, trappingB. near the sea 1. 2 means of livelihood: c. logging
