新视角研究生英语读说写三单元课后练习答案省公共课一等奖全国赛课获奖课件.pptx
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1、 Exercises Reading Comprehension Reading Comprehension Structure of the Text Structure of the TextUnit 3:ExercisesExercises Vocabulary Vocabulary Cloze Cloze Translation Translation第1页Unit 3:Reading comprehensionReading comprehension1.1.In In paragraph paragraph 1,1,the the author author says says t
2、hat that we we are are in in the the middle middle of of a a sixth sixth great great extinction.extinction.What What are are these these great great extinctions?extinctions?Could Could you you name name some.some.In In what what way way is is the the current current great great extinction different
3、from the previous five ones?extinction different from the previous five ones?The The difference difference lies lies in in the the fact fact that that the the previous previous five five great great extinctions extinctions have have occurred occurred for for natural natural causes,causes,but but the
4、 the current current great great extinction extinction has has been been caused caused by by human human activities.activities.ReferenceReferenceEx.I,p.50第2页Unit 3:Reading comprehensionReading comprehension2.2.What is the author trying to do with paragraph 2?What is the author trying to do with para
5、graph 2?The The author author gives gives us us some some examples examples to to show show what what human human needs needs have have caused caused the the current current great great extinction.extinction.Generally Generally speaking,they are humans needs for survival.speaking,they are humans nee
6、ds for survival.ReferenceReference第3页Unit 3:Reading comprehensionReading comprehension3.3.Why Why did did the the buffalo buffalo and and the the passenger passenger pigeon pigeon in in North North America become extinct?America become extinct?Both Both the the buffalo buffalo and and the the passen
7、ger passenger pigeon pigeon became became extinct extinct owing to overhunting by humans.owing to overhunting by humans.ReferenceReference第4页Unit 3:Reading comprehensionReading comprehension4.4.What What point point does does the the author author want want to to illustrate illustrate by by writing
8、writing about the European rabbits in paragraph 4?about the European rabbits in paragraph 4?He He wants wants to to illustrate illustrate that that natural natural habitats habitats of of some some native native species species could could be be destroyed destroyed by by the the introduction introdu
9、ction of of foreign foreign species.species.The The introduction introduction of of European European rabbits rabbits into into Australia Australia is is a a good good example.example.They They multiplied multiplied quickly quickly and and threatened threatened the the habitat habitat of of native n
10、ative grazing grazing animals animals in in Australia by eating all the vegetation.Australia by eating all the vegetation.ReferenceReference第5页Unit 3:Reading comprehensionReading comprehension5.5.In In paragraph paragraph 5,5,the the author author states states that that humans humans endanger endan
11、ger other other species species by by destroying destroying their their natural natural habitats.habitats.What What example does the author give to support this statement?example does the author give to support this statement?The The example example is:is:The The rapid rapid shrinking shrinking of o
12、f rainforest rainforest caused caused the loss of many species that made their homes in it.the loss of many species that made their homes in it.ReferenceReference第6页Unit 3:Reading comprehensionReading comprehension6.6.What can we learn from paragraph 8?What can we learn from paragraph 8?Each Each li
13、fe life form form occupies occupies a a special special place place in in the the ecosystem,ecosystem,and and the the disappearance disappearance of of any any species species will will affect affect other other species species in in the the ecosystem.ecosystem.But But 74 74 species species are are
14、dying dying out out every day.every day.ReferenceReference第7页Unit 3:Reading comprehensionReading comprehension7.7.What What are are the the two two advantages advantages that that biodiversity biodiversity has has over over monocultures according to paragraphs 912?monocultures according to paragraph
15、s 912?1)1)Biodiversity Biodiversity makes makes it it possible possible for for useful useful substances substances to to be found in species we havent got to test or study.be found in species we havent got to test or study.2)2)Biodiversity Biodiversity will will save save humanity humanity from fro
16、m being being starved starved to to death death owing owing to to their their great great dependence dependence on on a a small small number of species.number of species.ReferenceReference第8页Unit 3:Reading comprehensionReading comprehension8.8.In In paragraph paragraph 10,10,the the author author wr
17、ites writes about about the the Pacific Pacific yew yew tree.tree.What What makes makes the the Pacific Pacific yew yew tree tree so so highly highly valued valued today?today?What What does does the the author author want want to to tell tell us us by by mentioningthis tree?mentioningthis tree?Beca
18、use Because it it is is discovered discovered that that the the bark bark of of the the Pacific Pacific yew yew tree tree contains contains a a substance substance called called taxol,taxol,which which can can effectively effectively treat treat certain certain kinds kinds of of cancer.cancer.By By
19、mentioning mentioning this this tree,tree,the the author author wants wants to to tell tell us us that that many many species species may die out before their value is discovered.may die out before their value is discovered.ReferenceReference第9页Unit 3:Reading comprehensionReading comprehension9.9.Wh
20、at is the main idea of paragraph 11?What is the main idea of paragraph 11?Paragraph Paragraph 11 11 mainly mainly tells tells us us that that the the value value of of the the vast vast majority majority of of species species has has yet yet to to be be discovered.discovered.It It is is very very im
21、portant important for for us us to to protect protect the the diversity diversity of of species.species.If If we we dont,dont,we we will will lose lose species species that that may may turn turn out out to to be be extremely important to our own survival.extremely important to our own survival.Refe
22、renceReference第10页Unit 3:Reading comprehensionReading comprehension10.10.What point is suggested by the last paragraph?What point is suggested by the last paragraph?It It suggests suggests that that its its hard hard to to tell tell whether whether these these protective protective methods methods w
23、ill will be be effective effective or or not not now now because because the the rapid rapid human human population population growth growth may may make make it it difficult difficult to to put put these these methods into practice.methods into practice.ReferenceReference第11页1.1.Introduction(Paras.
24、12)Introduction(Paras.12)2.2.Body(Paras.315)Body(Paras.315)3.3.Conclusion(Para.16)Conclusion(Para.16)Text OutlineText OutlineUnit 3:Structure of the textStructure of the textEx.II,p.51第12页1.1.Introduction(Paras.12)Introduction(Paras.12)We We are are in in the the middle middle of of a a sixth sixth
25、great great extinction,extinction,which which is is caused by _.caused by _.Text OutlineText OutlineUnit 3:Structure of the textStructure of the texthuman activitieshuman activities第13页2.2.Body(Paras.315)Body(Paras.315)1)1)_ _ that that human human activities activities endanger endanger other other
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