UNIT1 GREAT SCIENTISTS 课件 READING高中课件下载.ppt

unit 1 great scientists,reading,john snow defeats “king cholera”,teaching aims:,1. get some information about john snow and cholera.,2. reading the passage and get the main idea of each paragraph.,john snow (1848-1854),英国著名内科医生,针对伦敦霍乱的流行，创造性地使用了病例分布的标点地图法，首次提出了“霍乱是介水传播”的著名科学论断，并通过干预成功地控制了进一步流行，成为流行病学现场调查、分析与控制的经典实例。当时疾病病因有毒气(瘴气)理论和传染(细菌)两大理论，斯诺医师的霍乱研究彻底否定了瘴气理论。,cholera,霍乱(cholera)，早期译作虎烈拉，是由霍乱弧菌所致的烈怀肠道传染病，临床上以剧烈无痛性泻吐，米泔样大便，严重脱水，肌肉痛性痉挛及周围循环衰竭等为特征。霍乱弧菌包括两个生物型，即古生物型和埃尔托生物型。过去把前者引起的疾病称为霍乱，把后者引起的疾病称为副霍乱。,1. how many theories did john snow get interested in?,paragraph 2,2. what are these theories mainly about?,1. which theory did snow believe in?,paragraph 3,2. what happened in 1854?,3. how many people died in 10 days?,1. what clues did the map give?,2. why some houses had had no deaths?,paragraph 4,3. what seemed to blame?,1. what is the source of the water? and what happened to it?,paragraph 5,2. why did the disease began to slow down?,1. what did snow shown?,paragraph 6,2. according to snows announcement, what cause the disease?,3. can you tell what is the extra evidence?,in order to prevent the disease happening again, what did snow suggest?,paragraph 7,read the passage again and finish,scientific report by john snow,nobody knew the cause of the serious disease of cholera,a strange cloud of gas found its victims,people absorbed the disease with meals,collect information from the cholera outbreak to prove which theory was correct,he found the cause of cholera was the polluted water,idea 2. because the information showed that the dirty water carried cholera,he