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高一英语必修1同步课件(人教版):Unit 4 Section Ⅰ Warming Up & Reading — Pre-reading_图文

Section_Ⅰ Warming_Up_&_Reading_—_Prereading 1.As is known to us, the earthquake in Japan on March 11, 2011 did great damage to the Japanese. Can you tell us what kind of damage earthquakes can bring to people? 2.Do you know why earthquakes happen? Please read the following passage to get the answer. 地震,是地球内部发生的急剧破裂产生的震波,在一定范围内引起 地面振动的现象。地震是地球上经常发生的一种自然灾害,全球每年发 生地震约550万次。 The earthquake is a sudden, violent shaking of the earth ’s surface. It is regarded as one of the most damaging forces known to man. As to our country, a large number of earthquakes happened in North China and Northwest China. On May 12, 2008, a terrible earthquake happened in Wenchuan, Sichuan Province, which caused more than 60,000 deaths and the whole city was destroyed. During an earthquake, there is often a great noise first. Then the earth shakes terribly, many houses fall down, railway tracks break and trains run off lines. A great many factories are destroyed, thousands of deaths are caused, and many more lose homes. Besides the great damage and deaths caused by the earthquake itself, other disasters such as fires often follow. More buildings are destroyed and more deaths are caused. Why do earthquakes happen? Scientists explain that the outside of the earth is made up of a number of different plates. These plates are moving slowly. Sometimes the plates stop and do not move for years. Then suddenly, they jump and an earthquake is felt. The plate movements mostly appear in the east and west of the Pacific Ocean. China, Japan, South America and the west coast of North America have always been bad places for earthquakes. At San Francisco, the Pacific plate which is moving towards northwest meets the North American plate. The Pacific plate is moving very slowly — at 5.3 centimeters a year. As a result of the movement of these plates, California has always had a lot of earthquakes. When the 1906 earthquake happened, the Pacific plate jumped 5—6 meters to the north. China also has an unlucky place on the earth. The Pacific plate is also pushing on China from the east as the plate moves west. Likewise, the Indian plate is pushing on China from the southwest as that plate moves northeast. The same power that produced the great Himalayan Mountains now causes earthquakes in China. Warming Up 1.How many natural disasters do you know? Please write their names below. 答案:A.tornado D.flood B.drought E.typhoon C.earthquake F.sandstorm 2. What might happen to a place when there

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