高中英语课外阅读丛书·生活中的科学（上册）

出版时间：2004-2  出版社：上海教育出版社  作者：许向群  页数：109  

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.Black Hole2.Energy3.Atmospheric Perspective4.RadiO5.Echo Sounder6.Color7.Brighmess of Light8.Halley'S Comet9.Doppler Effect10.Solar Wind11.Elemental Analysis Catches Elephant Hunters12.Firewalking：Magic Or Science?13.Automatic Sunglasses14.Acid Rain：A Growing Problem15.Potassium-Too Much of a Good Thing Can I(i11 You16.Measuring the pH of a Solution17.Carbonates Growing from the Sea18.The Growing Periodic Table19.Chemistry That Doesn't Leave You in the Dark20.Measuring the Masses of Large Molecules of Making Elephants Fly21.Why You Need Food22.The Food Guide Pyramid23.How Diseases Are Spread?24.AIDS25.Reflexes26.Getting Fit，Staying Fit27.Why Is Cancer So Dangerous?28. Nicotine 29. The Kidney 30. Human Activity and the Sea-horses 31. The Earth's Blanket: the Atmosphere 32. Features of the Earth 33. Erosion 34. "The Baby Boy" and "The Baby Girl" 35. Deltas 36. Fossils 37. Mexico Earthquake 38. Karst Landscape 39. How Old Is the Earth? 40. Paris and Harbin: Same Latitude, Different Temperature 41. Computers (1) 42. Computers (2) 43. Wired to Learn ( 1 ) 44. Wired to Learn (2) 45. What is the Impact of the Internet on the Social Behaviour of Children?(1) 46. What is the Impact of the Intemet on the Social Behaviour of Children?(2) 47. Is Internet a Useful Medium to Educate Children? 48. Computers and Children (1) 49. Computers and Children (2) 50. Computers and Children (3)

章节摘录

　　Radio, system of communication employing electromagnetic waves spreadthrough space. Because of their varying characteristics, radio waves of differentlengths are used for different purposes and are usually identified by theirfrequency. The shortest waves have the highest frequency, or number of cyclesper second; the longest waves have the lowest frequency, or fewest cycles persecond. In honor of the German radio pioneer Heinrich Hertz, his name hasbeen given to the cycle per second （hertz, Hz） ; 1 kilohertz （kHz） is 1,000cycles per sec, 1 megahertz （MHz） is 1 million cycles per sec, and 1 gigahertz（GHz） is 1 billion cycles per sec. Radio waves range from a few kilohertz toseveral gigahertz. Waves of visible light are much shorter. In a vacuum, allelectromagnetic waves travel at a uniform speed of about 300,000 km persecond. Radio waves are used not only in radio broadcasting but in wirelesstelegraphy, telephone transmission, television, radar, navigational systems,and space communication. In the atmosphere, the physical characteristics of theair cause slight changes in voiecity, which are sources of error in such radio-communications systems as radar. Also, storms or electrical disturbancesproduce anomalous phenomena in the spread of radio waves. 　　……