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选修六课文缩写.doc

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选修六课文缩写.doc
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选修六Unit5 The power of natureThe volcano eruption is one of the most powerful forces on earth. When boiling rock erupts from the volcano and flows slowly down the mountain, more damage is caused because it buried everything under the molten rock. However, the eruption itself is really exciting to watch and I’ll never forget my first sight of an eruption. Having worked hard all day in Hawaii, I went to bed early. I was fast asleep when suddenly my bed began shaking and I heard a strange sound, like a railway train passing outside my window. I ran out of the house into the back garden to see Mountain Kilauea in the distance. There had been an eruption in the side of the mountain and red hot lava was fountaining hundreds of meters into the air. It was an absolutely fantastic sight. Having studied volcanoes for many years, I am still amazed at their beauty as well as their potential to cause great damage.Unit 4 Global warmingAll scientists subscribe to the view that is human activity that has caused the global warming. This activity is burning fossil fuels to produce energy. As a result, a natural phenomenon called the “greenhouse effect” has come about. Without this phenomenon, the earth would be about thirty-three Celsius cooler than it is. So, we need those gases. However, the global temperature will rise when we add huge quantities of extra carbon dioxide into the atmosphere. We know that the levels of carbon dioxide have increased greatly over the last 100 to 150 years. The attiude of scientists to this rise is completely different. Some think that the trend would be a catastrophe while some are opposed to this view, and they believe that any warming will be mild with few bad environmental consequences.Unit 3 A healthy lifeDear James,Smoking can produce many harmful effects and has no benefits. First, nicotine in cigarettes is a kind of drug. Long-term smoking can make you become accustomed to having nicotine in your body. When the drug leaves your body, you will feel bad-tempered and sometimes even in pain. Secondly, smoking repeatedly can make you get into a habit of smoking automatically. Lastly, you can become mentally addicted because you may think having a cigarette can make you happier and more relaxed.Smoking can do terrible damage to your heart and lungs, and it will be more difficult for smoking couples to become pregnant. When I smoked, my girlfriend thought I smelt terrible. I also noticed that I became breathless quickly. When I was taken off the school football team because I was unfit, I knew it was time to quit smoking.
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