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1、单词注释,难句剖析,导读诱思,全球变暖引起北极冰雪融化,这一变化给北极熊赖以生存的家园带来了极大的威胁。北极熊通常在冰原上养育幼崽,而随着冰的融化,它们待在陆地上的时间被迫加长,吃不到冰面上可以捕捉到的海豹,从而只能以当地猎人捕捉的鲸的残余物为食这严重影响了它们的生存及繁殖。,单词注释,难句剖析,导读诱思,Due to climate changes,Arctic ice is breaking up earlier in the spring,and its area is decreasing.This is creating problems for polar bears that m
2、ake their homes off northern Alaska and in Hudson Bay.,单词注释,难句剖析,导读诱思,Polar bears off Alaska normally hunt and raise their young on ice sheets that float on the ocean.But as the ice has melted,the polar bears have been forced to spend more time on land.There,they have begun to frequent beaches,feedi
3、ng on the remains of whales caught by native hunters.For polar bears,this food is less nutritious than seals that they normally catch on ice sheets.The shrinking ice has also forced more polar bears into the ocean.In the past,they only had to swim short distances between ice sheets.But as the ice ha
4、s shrunk,polar bears have been forced to swim longer and longer distances in the open ocean.This poses a severe danger during rough weather,and an increasing number of drowned polar bears have been observed.,单词注释,难句剖析,导读诱思,In Hudson Bay,the ice breaks up three weeks earlier in the spring now than it
5、 did 20 years ago.Polar bears in Hudson Bay fast during the summer,waiting for ice to form in the fall to hunt.Every year,the summer gets longer,and the bears get skinnier.Over the past 25 years,the average weight of the female bears has dropped 68 kg.This loss affects their ability to reproduce,and
6、 already the number of births has dropped by 15 percent.Unless the bears can learn to survive these climate changes,these giants of the ice may one day disappear.,单词注释,难句剖析,导读诱思,frequent /frIkwent/ vt.频繁地去 remains /rImeInz/ n.剩余物 nutritious /njtrIs/ adj.有营养的 pose /pz/ vt.造成;形成 fast /fst/ vi.绝食 skinn
7、y /skInI/ adj.极瘦的;皮包骨的(skinnier为skinny的比较级),单词注释,难句剖析,导读诱思,This poses a severe danger during rough weather,and an increasing number of drowned polar bears have been observed. 译文:这在天气恶劣的时候造成严重的危险,被发现的溺水的北极熊越来越多。 剖析:这是一个由and连接的并列句。第二分句的主语为polar bears,谓语动词是have been observed(现在完成时的被动语态)。,单词注释,难句剖析,导读诱思
8、,1.What is the main idea of the passage? 答案:The negative effects of climate changes on polar bears. 2.What does the writer imply about female polar bears in Hudson Bay? 答案:They are having fewer young now.,一,二,三,四,五,六,七,一、请看下面的图片,回答问题,What can you learn from the above four pictures? 答案:The earth is b
9、ecoming warmer and warmer.,一,二,三,四,五,六,七,二、下面哪些现象有可能造成全球变暖,答案:B,C,D,一,二,三,四,五,六,七,三、将下列单词或短语与对应的释义搭配起来 AB e abouta.amount 2.go upb.to happen 3.be opposed toc.to say;to illustrate 4.quantityd.to rise 5.statee.to cause;to lead to 6.tendf.to object to 7.result ing.to take a particular direction 8.rando
10、mh.lacking any definite plan or order or purpose 9.subscribei.to pay money regularly to support a charity 答案:1.b2.d3.f4.a5.c6.g7.e8.h9.i,一,二,三,四,五,六,七,四、短语填空 e 发生;造成 2.subscribe 同意;赞成;订购 3.quantities 大量的 4.go 上升;增长;升起 5.result 导致 6.be opposed 反对 7.build 累积 8.even 即使 9.keep 继续,about,to,of,up,in,to,up
11、,if/though,on,一,二,三,四,五,六,七,五、阅读THE EARTH IS BECOMING WARMERBUT DOES IT MATTER?,将各个段落与其段意搭配起来 Para.1A.the cause of the earths becoming warmer Para.2B.the consequence of burning fossil fuels Para.3C.the increase of carbon dioxide Para.4D.global warming will go on Para.5E.puzzles about global warming
12、Para.6F.different attitudes to global warming Para.7G.an introduction to the passage 答案:Para.1GPara.2APara.3BPara.4C Para.5DPara.6FPara.7E,一,二,三,四,五,六,七,六、阅读THE EARTH IS BECOMING WARMERBUT DOES IT MATTER?,完成下列各题 1.How much did the temperature rise in the 1900s? A.One degree Fahrenheit. B.One Celsius
13、. C.Two degrees. D.Thirty degrees Celsius. 答案:A,一,二,三,四,五,六,七,2.What causes the temperature of the earth to increase? A.Planting trees. B.Wasting the farmland. C.Running out of the river water. D.Burning fossil fuels. 答案:D 3.Who accurately measured the amount of carbon dioxide in the atmosphere from
14、 1957 to 1997? A.Dr Janice Foster. B.Fahrenheit. C.Charles Keeling. D.George Hambley. 答案:C,一,二,三,四,五,六,七,4.George Hambley believes that more carbon dioxide is actually. A.a bad thing B.a dangerous thing C.a comparative thing D.a positive thing 答案:D 5.What is the main idea of this passage? A.Global w
15、arming. B.Flood phenomenon. C.Making methane. D.Making greenhouses. 答案:A,一,二,三,四,五,六,七,七、根据课文内容填空 All scientists subscribe to the view 1. it is human activity that has caused global warming.The huge quantities of carbon dioxide produced by burning fuels like coal,natural gas and oil resulted 2. the
16、“greenhouse effect”.All scientists also agree that the level of carbon dioxide 3.(keep) on increasing,so more heat energy tends to 4.(trap) in the atmosphere.But the scientists have different attitudes 5. this phenomenon.6. the one hand,some think the trend of increasing the temperature by 5 degrees would be a catastrophe.,that,in,keeps,be trapped,towards/to,On,一,二,三,四,五,六,七,On the other hand,others 7. (oppose) to this view and believe that there will be few bad environmental consequences 8.(cau
