新人教版选修二语境识词Unit 1（背诵版+练习版）

新人数·选修二 Unit I 背诵版（一） Elaine英语 Elaine英语 Cholera is an infectious disease caused by germs.People who are infected with this disease will suffer from severe diarrhoea, dehydration and even death.As a young doctor,John Snow felt a little frustrated at first,but he was determined to defeat "King Cholera"once and for all.There were then two contradictory theories to explain how cholera spread. Snow subscribed to the correct theory that cholera was caused by an infection from germs in food or water.But Snow needed proof and findings.It happened that cholera broke out in London in 1854,and Snow began to investigate.He discovered that there were multiple deaths in some households near the water pump in Broad Street.This showed there was a link between the cases of cholera and the water.Snow suspected that the water pump was to blame,so he had the handle of the water pump removed.Thanks to Snow's intervention,people began to drink pure water instead of raw water.Thus,there was a substantial decrease in the threat of cholera.Furthermore,in his use of maps and statistics,Snow transformed the way scientists study diseases.His thinking and concept on disease were quite novel at that time.Therefore,Snow is considered the father of modern epidemiology. Elaine英语 麗乱是一种由细菌引起的传梁病。感梁这种疾病的人会严重腹泻、脱水甚至 死元。作为一名年轻的医生，约翰·斯诺一开帕感到有点沮丧，但他决心砌底 击败“麗乱王”。当时有两种截然不同的理论来解释麗乱是妙向传播的。斯诺赞 同正确的理论，即電乱是由食物或水中的细菌感梁引起的。但斯诺需要证据和调 查结果。854年伦敦怡巧暴发乃麗乱，斯诺开调查。他发现宽街水系附近的 一些住户有多人死元，这说明麗乱病例与饮用水有关联。斯诺怀疑水系是罪财祸 省，于是他让人把水泵的把手拆掉ㄋ。多亏乃斯诺的干预，人们开帕欧用纯净水 而不是原水。因此，麗乱的威胁大幅降西。比外，斯诺利用地图和统计教据， 放变马科学家研缔疾病的方式。他对疾病的思考和观念花当时是相当新颖的。因 Elaine英语 此，斯诺被认为是现代流行病学之父。 Elaine英语