英语听说练习PDF电子书下载

CONTENTSSelection1．Thunderstorms 3

2．The Human Heart 4

3．The Human Brain 6

4．Great Discoveries and Inventions 8

5．Molecules 10

6．Migration 11

7．Mercury：A Poison Encountered in Industry 14

8．Bamboo 15

9．The Three States of Matter 17

10．Archimedes's Principle 18

11．Speed in the Supermarket 21

12．Reproduction of Salmon 22

13．Plants 24

14．A Valley of Death and Prosperity 26

15．A Plan for Manhattan Traffic 28

16．A New Theory of Dental Care by R.V.Tait 30

17．The Powerful Influence of Weather 32

18．Food Chains 34

19．Rocks 36

20．Intelligence 38

21．Plastic Surgery 40

22．Carnivorous Plants 41

23．Changes in Telephones and Television 43

24．Our Neighbours in Space 45

25．Food Personalities 47

26．The Polar Regions 49

27．Conditioning 51

28．Obesity Research 53

29．How Pencils Are Made 55

30．Two Vital Elements 57

31．Water Pollution 59

32．Credit Cards 61

33．The Biological Clock 65

34．The Preservation of Food（Part 1） 66

35．The Preservation of Food（Part 2） 68

36．Climate and Vegetation 70

37．Why Didn't the Iceberg Sink to the Bottom of the Sea？ 73

38．The Earth and the Sun 74

39．Alcohol 77

40．Six Essential Foodstuffs for the Body 79

41．Spare Parts for the Human Body 82

42．About Lefties 84

43．Elephants 87

44．A City Is Dying 90

45．Black Gold 93

46．Laser-Technology for the Future 95

47．Earthquakes 97

48．Bees 99

49．Penicillin 101

50．Television 103

51．Color 104

52．Noise 107

53．“Stop the world,I want to get off” 110

54．Amazing Partnerships in Nature 112

55．The Psychology of Money 115

56．What Will the Future Be？ 117

57．Galileo 120

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Key to Exercises 247

Appendix 254