地球的过去和现在PDF电子书下载

CONTENTS 1

Part Ⅰ 1

HOW THE WORLD BEGAN 1

The World in the Making 2

First Age of Life 6

Second Age of Life 9

Third Age of Life 10

Fourth Age of Life 11

Man’s Age of Life 12

The Ages of Life 13

Part Ⅱ 15

ThE FACE OF THE WORLD 15

The Earth Around the Sun 15

Sun Shines， Rain Falls 18

Winds Blow 20

Plants Grow 22

Work of Wind and Water 23

Work of Sea and Ice 25

More of Nature’s Work 26

Part Ⅲ 29

MAN’S WORLD 29

Man and Minerals 29

Man and Power 31

Man Must Travel 32

Life in Plains 33

Life in Mountains 35

Life by Rivers 35

Life in Forests 36

Life in Cold Countries 37

Life in Deserts 38