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1、Reading and Writing外语教学与研究出版社Unit 3外语教学与研究出版社ContentWarming-upWarming-upReadingReadingWritingWritingText AText AText BText B外语教学与研究出版社Warming-upWarming-up外语教学与研究出版社1. Watch the Video Clip about Global Warming.2. Discussion: 1) In what ways does human activity influence the environment? Offer some ex
2、amples.2) Have you experienced the pressure of Chinas large population? Tell about your experiences. 3) For how long do you think China should insist its Famlily Planning Activity? Why?3. Each group appoint one representative to give a presentation about the groups discussion. Group discussion 外语教学与
3、研究出版社THE CASE AGAINST MAN (PART I) Isaac Asimov外语教学与研究出版社ReadingText AReadingText AText StudyText StudyMain Idea 外语教学与研究出版社Text Study外语教学与研究出版社1 The first mistake is to think of mankind as a thing in itself. It isnt. It is part of an intricate web of life. And we cant think even of life as a thing i
4、n itself. It isnt. It is part of the intricate structure of a planet bathed by energy from the Sun.n2 The Earth, in the nearly 5 billion years since it assumed approximately its present form, has undergone a vast evolution. When it first came into beingcame into being, it very likely lacked what we
5、would today call an ocean and an atmosphere. These were formed by the gradual outward movement of material as the solid interior settled together.n3 Nor were ocean, atmosphere, and solid crust independent of each other after formation. There is interaction always: evaporation, condensation, solution
6、, weathering. Far within the solid crust there are slow, continuing changes, too, of which hot springs, volcanoes, and earthquakes are the more noticeable manifestations here on the surface. Para.1-3外语教学与研究出版社Para.4-6n4 Between 2 billion and 3 billion years ago, portions of the surface water, bathed
7、 by the energetic radiation from the Sun, developed complicated compounds in organization sufficiently versatileversatile to qualify as what we call “life”. Life forms have become more complex and more various ever since.n5 But the life forms are as much part of the structure of the Earth as any ina
8、nimate portion is. It is all an inseparable part of a whole. If any animal is isolated totally from other forms of life, then death by starvation will surely follow. If isolated from water, death by dehydration will follow even faster. If isolated from air, whether free or dissolved in water, death
9、by asphyxiation will follow still faster. If isolated from the Sun, animals will survive for a time, but plants would die, and if all plants died, all animals would starve.n6 It works in reverse, too, for the inanimate portion of Earth is shaped and molded by life. The nature of the atmosphere has b
10、een changed by plant activity (which adds to the air the free oxygen it could not otherwise retain). The soil is turnedturned by earthworms, while enormous ocean reefs are formed by coral.外语教学与研究出版社Para.7-9n7 The entire planet, plus solar energy, is one enormous intricately interrelated system. The
11、entire planet is a life form made up of nonliving portions and a large variety of living portions (as our own body is made up of nonliving crystals in bones and nonliving water in blood, as well as of a large variety of living portions).n8 In fact, we can pursue the analogy. A man is composed ofis c
12、omposed of 50 trillion cells of a variety of types, all interrelated and interdependent. Loss of some of those cells, such as those making up an entire leg, will seriously handicap all the rest of the organism: serious damage to a relatively few cells in an organ, such as the heart or kidneys, may e
13、nd by killing all 50 trillion.n9 In the same way, on a planetary scale, the chopping down of an entire forest may not threaten Earths life in general, but it will produce serious changes in the life forms of the region and even in the nature of the water runoff and, therefore, in the details of geol
14、ogical structure. A serious decline in the bee population will affect the numbers of those plants that depend on bees for fertilization, then the numbers of those animals that depend on those particular bee-fertilized plants, and so on.外语教学与研究出版社Para.9-11n10 Or consider cell growth. Cells in those o
15、rgans that suffer constant wear and tearwear and tearas in the skin or in the intestinal lininggrow and multiply all life long. Other cells, not so exposed, as in nerve and muscle, do not multiply at all in the adult, under any circumstances. Still other organs, ordinarily quiescent, as liver and bo
16、ne, stand ready to grow if that is necessary to replace damage. When the proper repairs are made, growth stops.n11 In a much looser and more flexible way, the same is true of the “planet organism” (which we study in the science called ecology). If cougars grow too numerous, the deer they live onlive on are decimateddecimated, and some of the cougars die of starvation, so that t
