1.Amusing Experiments(有趣的实验) 1
(1)The Egg and Friction(蛋与摩擦) 1
(2)Bernoulli's Principle(伯努利定理) 1
(3)Pascal's Law(帕斯卡定律) 2
2.Echo-location(回声定位) 5
3.Environmental Problems Global—Acid rain,carbon dioxide ignore borders(环境问题是全球性的——酸雨、二氧化碳没有国界) 9
4.Gold(黄金) 14
5.Some of That Oil Pollution in the Sea Is Natural(部分海洋石油污染是天然的) 19
6.The Underworld(大地) 23
7.Journey to the Moon(2)(飞向月球(2)) 29
8.是同位语从句,还是定语从句? 36