2012高中英語課時講練通配套課件 Unit1《Great scientists》Period 1新人教版必修5

,. Match the following great scientists with their contributions.,1. The electric light bulb ( F ) 2. The Origin of Species ( D ) 3. Universal Gravitation and Three Laws of Motion ( B ) 4. The development of telescope ( C ) 5. Big Bang Theory and Black Hole Theory ( A ) 6. Theory of Relativity ( E ),. Skim the passage and answer the following question. Why is the cholera called“King Cholera” in the text? _ _ _,Because cholera was the deadly disease of its day. Neither its cause nor its cure was understood. So many thousands of terrified people died every time there was an outbreak.,. Fill in the blanks according to the text.,. Scan the reading passage and choose the best answers. 1. Whats the purpose of the text? A. To show us how difficult it was to find a cure for cholera. B. To tell us how John Snow found the cause of cholera and the cure for it. C. To show us how difficult it was to carry out experiments at that time. D. To tell us the way cholera spread and how serious it was.,2. John Snow finally proved the theory he believed by_. A. gathering information with the help of a map B. looking into the source of the water for Broad Street and Cambridge Street C. separating those who suffered cholera from those who didnt D. both A and B,3. Which of the following is TRUE according to the text? A. John Snow became famous after cholera hit England in the 19th century. B. John Snow began to collect information long before cholera hit England in the 19th century. C. The mother and her daughter mentioned in the text both lived in Broad Street. D. John Snow felt unsure about the cause of cholera after he marked on the map.,4. Which of the following theories did John Snow believe? A. Cholera multiplied in the air. B. People absorbed the disease into their bodies, then were affected and died. C. People spread the virus when speaking to each other. D. People didnt pay attention to personal hygiene(衛(wèi)生),5. When was John Snow able to announce for sure that polluted water carried the virus? A. After he found a supporting evidence. B. After he looked into the source of the water for those two streets. C. When cholera broke out. D. After many more people died,. Fill in the blanks according to the reading passage using words we have just learnt. John Snow was an 1. expert physician who ever 2. attended Queen Victoria. Cholera was the deadly disease of its day. As neither its cause nor its 3. cure was found, many thousands of people who were 4. exposed to the disease died every time there was an 5. outbreak. To help the ordinary people, John Snow was determined to face the 6. challenge and solve this problem. Through analysis, John Snow 7. suspected that,people 8. absorbed this disease into their bodies with their meals. So when another outbreak hit London in 1854, he was ready to make an 9. enquiry and collect information. He mapped the places where all the dead people had lived and found that the 10. victims had been drinking the water from the river 11. polluted by the dirty water from London. He 12. instructed people to remove the 13. handle from the pump and the disease slowed down. Having found another supporting evidence, he 14. announced with certainty that the water was to 15. blame. Finally, “King Cholera” was 16. defeated.,In the rush to get to school, you drop a piece of toast on the floor. Do you throw it away or decide its still OK to eat? If youre like most people, you eat it. Maybe you follow the “5-second rule”, which claims foods are safe to eat if you pick them up within 5 seconds after dropping them.,But you might want to think again. Scientists now say that 5 seconds is all it takes for foods to become polluted with enough bacteria (細菌) to make you sick. Bacteria can cause many kinds of illnesses. Some kinds of bacteria can grow on food. If you eat foods on which these bacteria are growing, you can become sick.,One of these food-borne bacteria is Salmonella. It makes 1. 4 million people sick every year. Salmonella is often found in raw eggs and chicken. Cooking kills these bacteria, which is why it is so important to cook eggs, chicken, and other foods thoroughly.,But how long does it take these bacteria to pollute food? A team of scientists in South Carolina did an experiment. First, they placed an amount of Salmonella on three surfaces: wood, tile (瓦片) and carpet. They placed a piece of bread and a piece of bologna (一種大紅腸) on each surface for 5, 30 and 60 seconds. After just 5 seconds, both the bread and the bologna picked up enough bacteria to make you sick. So, forget the 5-second rule. If your toast drops on the floor, throw it away and get another piece of clean toast. And this time, be careful not to drop it!,1. In which part of a newspaper can you most probably find this passage? A. Culture B. Health C. Advertisement D. Technology 【解析】選B。推理判斷題。文章從“五秒鐘定律”談掉在地上的烤面包能不能吃，又談到科學家通過實驗否定“五秒鐘定律”的說法。根本內(nèi)容是食品與健康問題。,2. After dropping a piece of toast, a person who follows the “5-second rule” will_. A. throw away dirty toast immediately and go away B. pick up the toast as quickly as possible and eat it C. eat the toast within 5 seconds and feel pleased D. get another piece of clean toast quickly and eat it 【解析】選B。細節(jié)理解題。從第一段最后一句可以看出。,3. The underlined word“raw” in Paragraph 4 most probably means_. A. delicious B. hot C. cheap D. uncooked 【解析】選D。詞義猜測題。從第四段第三句和第四句的對比可以看出“raw”的意思是“未煮過的；生的”。,4. The scientists in South Carolina did the experiment to_. A. see how quickly bacteria can pollute food B. show that the 5-second rule is correct C. see how harmful bacteria are to peoples health D. show that bacteria grow at different speeds on different foods 【解析】選A。細節(jié)理解題。從第五段尤其是首句和最后一句可以看出，科學家的實驗是要測驗一下食物沾染細菌的速度有多快。,Thank you!,同學們,來學校和回家的路上要注意安全,同學們,來學校和回家的路上要注意安全,