通俗科技英语文选 第18辑PDF电子书下载

1 Why Do Crocodiles “Eat”Their Own Young？(为什么鳄鱼“吞噬”自己的幼鳄？) 1

2 Cotton (棉花) 4

3 Canadians Take a Sound Approach to Pest Control (加拿大人研究用声波控制鼠害) 8

4 How Much Sleep Do We Need？(我们需要多少睡眠？) 11

5 Distribution of Nutrients in Plants (植物养分的输导) 16

6 The Discovery of Preventing Germ Disease (预防细菌性疾病的方法是怎样发现的) 23

7 Bat s Radar (蝙蝠的雷达) 28

8 科技英语新词的构成(二) 截短 33

9 Confravision Could Save Travel Costs (电视电话会议可节省旅行费用) 35

10 Venus (金星) 40

11 Volcano Beneath the Sea(海底火山) 45

12 Aspirin s Amazing New Promise (阿司匹林出人意料的新用途) 50

13 Happy Accidents (幸福的意外) 55

14 词根：Grad-,Gress- 60

15 Making Reactions Run Uphill (使反应朝着费力的方向进行) 67

16 Are Humans Computers？(人是计算机吗？) 67

17 The Barmuda Triangle (百慕大三角地带) 72

18 Space and Man (Part Four) (太空与人 第四部分) 77

19 Test Yourself after the Reading (读后测验) 81

20 Why Do Lobsters Turn Red？(为什么龙虾会变红？) 87

21 Fine Balance (绝妙的平衡) 88

22 Answers to Hard Questions (难题解答) 89

23 Why a Quark？(为什么称作“夸克”？) 91

24 How Does Film Work？(胶卷是怎样成像的？) 92

25 Key to the Test (测验答案) 95