通俗科技英语文选 第16辑PDF电子书下载

1 Hard Water and Soft Water(硬水与软水) 1

2 Why Do Raccoons “Wash”Their Food？(浣熊为什么“洗”食物？) 2

3 World Opinions on the Alignment of Planets (世界各地对九星会聚的看法) 4

4 Nicotine s Effects on the Body (尼古丁对身体的影响) 8

5 New Uses for Fly Ash (飞灰的新用途) 11

6 Plants and the Weather (植物与天气) 14

7 What to Use When the Fossil Fuels Run Out (矿物燃料用尽时用什么) 17

8 Heat Transfer (热的传导) 22

9 Volcanoes (火山) 26

10 Sand: Nature s Wondrous Building Block (沙：大自然的绝妙构件) 30

11 Some Plants That We Eat (食用植物) 35

12 Watch Your Weight (But Wisely!)(小心而适当地注意体重!) 39

13 Space and Man (Part Two) (太空与人第二部分) 47

14 谈词根 50

15 Things Are Not What They Seem (似是而非的东西) 54

16 The Coldest Spot and the Highest Temperature on Earth (地球上最冷的地方和最高的温度) 55

17 Can You Sweat It Out？(出汗能排除废物吗？) 56

18 Asthmatics (哮喘) 57

19 Earth s Orbit Around the Sun (地球绕太阳运行的轨道) 58

20 Test Yourself after the Reading (读后测验) 59

21 Key to the Test (参考答案) 68