SCIENCE IN OUR LIFE（中）

出版时间：2004-2  出版社：上海世纪出版集团（上海教育出版社）  作者：许向群 编  页数：117  

内容概要

　　21世纪的社会是一个更加开放的社会，只有具备多种语言能力的人才能更好地立足于这个社会；21世纪的社会是一个更加科学的社会，只有具备一定科学素养的人才能更好地生存于这个社会。　　对于每个人来说，其生存和发展都无法离开语言和科学。如何将两者有机地融合在一起，是需要我们不断研究和探讨的课题。本套丛书尝试从高中学生的实际英语语言水平出发，找寻有关高中自然科学课程与学生熟知的科学常识的结合点，用英语作为一种语言载体，让学生在阅读、理解、练习的过程中掌握自然科学知识，提高英语语言能力。

书籍目录

1. Will the Sun Be a White Dwarf? 2. Microwaves 3. Meteor 4. Cosmic Rays 5. Red Shift 6, Capacitor7. Thunder 8. Superconductivity 9. The First Law of Thermodynamics 10. Plasma Physics 11, The Chemistry of Teeth 12. Fireworks (1) 13. Fireworks (2) 14. The Wild World of Water 15. Heat Packs 16. Fuels from Oils and Fats 17. Radioactivity: What You Don't See Can Kill Heal You 18. Polymers and Plastics: Too Much of a Good Thing ( 1 ) 19, Polymers and Plastics: Too Much of a Good Thing (2) 20. Use of Organofluorines 21. The Lemming Population 22. The Biology of Ecosystems 23. Lactose 24. What Causes Cancer? 25. Sex Determination 26. Sex-linked Inheritance 27. Toxic Pollutants 28. A Journey Along a Chromosome 29. The Potential of Genetics 30. When Control of Blood Glucose Fails 31. The Fight Against Malaria 32. Huntington's Disease 33. Monsoon 34. Plate Tectonics 35. Ocean Life Zones 36. Mt. Everest Is Gaining Height: True or False? 37. Rain Shadows Effects 38. Space Travel 39. Shrinking Rainforest 40. Rocks 41. Rivers: From Source to Sea42. Tundra Climate 43. The Origin of the Intemet 44. Search Engines 45. Problems of the Intemet 46. The Influence of the Internet 47. Use Internet 48. A New and Forward-looking Medium 49. Join a Community 50. Come to Me for Information 51. What Are the Bad Aspects of Internet? (1) 52. What Are the Bad Aspects of Internet? (2) ……

章节摘录

　　2. Microwaves　　Microwaves, short, high-frequency radio waves lying roughly betweenvery-high-frequency waves and conventional radio waves. Microwaves thusrange in length from about 1 mm to 30 cm. They are generated in specialelectron tubes. Microwaves have many applications: in radio and television,radar, meteorology, satellite communications, distance measuring, and researchinto the properties of matter. Microwave ovens operate by agitating the watermolecules in the food, causing them to vibrate, which produces heat. Themicrowaves enter through openings in the top of the cooking cavity, where astirrer scatters them evenly throughout the oven. They are unable to enter ametal container to heat food, but they can pass through nonmetal containers.　　Microwaves can be detected by an instrument consisting of a silicon-dioderectifier connected to an amplifier, and a recording or display device. Exposureto microwaves is dangerous mainly when high densities of microwave radiationare involved, as with masers. They can cause burns, cataracts, damage to thenervous system, and sterility. The possible danger of long-term exposure tolow-level microwaves is not yet well known.Nevertheless, the U. S.government limits the exposure level, in general, to 10 milliwatts per squarecentimeter. Stricter limits are placed on microwave ovens.