【正文】 him a valuable clue about the cause of the disease. valuable (1) adj. worth of a lot of money 值錢的 , 貴重的 如： The watch is valuable. 這表很值錢。 9. In two particular streets, the cholera outbreak was so severe that more than 500 people had died in 10 days. severe adj. (1)unsparing or harsh, as in treatment of others。 全神貫注于某事 如 : He is absorbed in his book. The little girl was absorbed in reading a tale. suggest 經(jīng)常有“建議”的意思 , 但在這個句子里的意思是“暗示間接表明”。 十分 deadly serious 十分認真 (2)like death 死一般地 deadly pale 死一般蒼白 7. So many thousands of terrified people died every time there was an outbreak. every time 在這里是連詞 , 引導(dǎo)時間狀語從句 , 意為“每次 , 每當”。 昨天我們看見的那個人是史密斯先生。 1) expert n. 專家 。s Cholera Map 7 What is the problem? The cholera was the most deadly disease of its day. Neither its cause, nor its cure was understood. What caused cholera? Make a question: Which theory to believe in? Cholera multiplied in the air without reason. A cloud of dangerous gas would float around until it found its victims. People absorbed it with their meals. Which one do you believe more? What about John Snow? A map of Broad Street What method did he use? Many deaths happened here. No death happened here. It seemed the water from the pump was to blame. What did he do next? Public house (Para 6) What was another supporting evidence? (Para 5) He looked into the source of the water… John Snow was able to announce with certainty that polluted water carried the virus. Read the passage and number these events in the order that they happened. John Snow began to test two theories. An outbreak of cholera hit London in 1854. He announced that the water carried the disease. John Snow marked the deaths on a map. 2 1 4 7 Careful— reading: King Cholera was defeated. He found that most of the deaths were near a water pump. He had the handle removed from the water pump. John Snow investigated two streets where the outbreak was very severe. 3 8 5 6 Para graph Stages in an experiment Example in this investigation 1 Find a problem 2 Make a question 3 Think of a method What cause cholera? Which theory is correct? Collect data on those who were ill or died and where they got their water. Fill in the blanks. 4 Collect results 5 Analyse results 6 find supporting evidence 7 Draw a conclusion Plot information on a map to find out where people died or did not die. Analyse the water to see if that is the cause of the illness. Find other evidence to support the analysis. The water is to blame. The source of all drinking water should be examined so that it is safe. draw a conclusion find a problem make a question think of a method collect results analyse the results repeat if necessary Match them Para 1 Para 2 Para 3 Para 4 Para 5 Para 6 Para 7 Prevention of Cholera 1. John Snow believed Idea 2 was right. How did he finally prove it? KEY: John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water. Read and answer the quest