中学英语拓展阅读丛书 自然科学系列 第4册PDF电子书下载

1 A The Oceans 1

1 B Tide Pools 3

2 A Computer Games in Education 5

2 B How to Be a Game Programmer 7

3 A The Rock Cycle 9

3 B The Natural Wonders of Bryce Canyon 11

4 A What Is Hail? 13

4 B The Sky Is Falling! 15

5 A Food Chains 17

5 B Fungus Farmers 19

6 A The Work of an Archaeologist 21

6 B The Process of an Archaeological Dig 23

7 A Electromagnets 25

7 B Electricity's Journey 27

8 A Water Properties 29

8 B Mangrove Trees Survive the Salt 31

9 A The History of Printing 33

9 B Hieroglyphs Uncovered 35

10 A The Scientific Process 37

10 B Exploring the World 39

11 A How Animals Cope 41

11 B It's a Skunk's Life 43

12 A How the Heart Works 45

12 B Why Work Out? 47

13 A Types of Volcanoes 49

13 B Mount Rainier 51

14 A The Prairie Ecosystem 53

14 B Prairie Dog Towns 55

15 A Transportation Innovations 57

15 B Incredible Inventors 59

16 A The Mighty Insect 61

16 B The Dragonfly: Ancient One 63

17 A Mountains 65

17 B Trailblazing Volunteers 67

18 A The Life of a Tree 69

18 B Tree Rings: Diary of a Life 71

19 A What Causes Lightning? 73

19 B Lightning Safety 75

20 A Space Mysteries 77

20 B Mars, Anyone? 79

21 A The History of Vaccinations 81

21 B What You Should Know About Rabies 83

22 A Energy from the Sun 85

22 B A Solar Eclipse 87

23 A Fire and the Forest Ecosystem 89

23 B Kirtland's Warbler 91

24 A The History of Lights 93

24 B You Can Help Conserve Electricity 95

25 A What Is the Wind? 97

25 B Making a Wind Vane 99

附录 101

Answer Key 101

Reading Rate 103

Comprehension Score 104

Comprehension Skills Profile 105