人教版高二英语必修五unit1readingppt课件.ppt

John Snow Defeats“King Cholera”According to the title,can you guess the main idea of the text?The text mainly tells usJohn Snow defeated King Cholera.how _John Snow:Para.1:John Snow was a famous doctor in London so expert,indeed,that he attended Queen Victoria as her personal physician.help ordinary people(who were)exposed to cholera.face the challenge and solve this problem.Cholera:The deadly disease of its day(in the 19th century)Neither its cause nor its cure was understood.Many thousands of terrified people died every time there was an outbreak.In two particular streets,the cholera outbreak was so severe that more than 500 people died in ten days.Para.1:“He knew that cholera would never be controlled until its cause was found.”What causes cholera?Para.1:Para.2:Two theoriesThe first theory Cholera multiplied in the air.The second theory People absorbed with their meals.Para.3-6Suppose you were John Snow,what kind of information would you go to collect?Q1:Where did the dead people live?Did they live in the same place？Q2:What did the dead people eat and drink?Q3:What caused their deaths?Q4:What did the dead people have in common?Q5:16372089pump3840BROAD STREETCAMBRIDGE STREET21John Snows Cholera Map7Pub16372089pump3840BROAD STREETCAMBRIDGE STREET21John Snows Cholera Map7PubIt seemed that the water was to blame!Thinking:Do you think John Snow would have solved this problem without the map?Give your reasons.With the map,he was able to identify the houses that had had many deaths(no deaths).And then he could survey their drinking habits.The results could be clearly showed on the map.In a way,it is the key to solving the problem.Further thinking:Is the word”seem”here necessary?Can we remove it?The word“seem”here is necessary,and we cant remove it.Scientific research should be serious,careful and cautious.Only investigation is not enough,the results we collected should be analyzed and tested.It seemed that the water was to blame.The water:troublemaker?The cause of the cholera?The waterthe sourceremove the handlepollutedThe disease slowed downmoved away from the place Drink the water from the pumpWater was the cause of choleraSupporting evidenceWhy did he need this supporting evidence?Can we make a conclusion without it?With this extra evidence John Snow was able to announce with certainty Supporting evidence can make the conclusion more reliable and accurate.It is whether people drank the water from the pump rather than whether people lived near the water pump that matters.Para.7:Finally“King Cholera”was defeated.To prevent this from happening again,1.John Snow suggested.2.The water companies were instructedThis text is structured according to .experimental stagesWhats the style of the text?A.Report B.B.Description C.C.Creative storyformal language with few adjectives;not emotional;facts John Snow,a well-known doctor in London,became 1 (inspire)when he thought about helping ordinary people 2 (expose)to cholera,a 3 (die)disease of its day.Many thousands of people died 4 there was an outbreak because no one knew the cause of it.John wanted to help solve the problem.Please fill in the blanks according to your understanding to the text.inspiredexposeddeadlywhenever He got interested in two theories 5 (explain)how cholera killed people.He believed in the second theory 6 suggested that people 7 (absorb)the disease with theirmeals.In 1854,when another 8 hit London,he was ready to test the two theories.9 the help of the map he made,he got a valuable clue about the cause of the disease and was able to announce that the water was 10 (blame).explaining thatabsorbedoutbreakWith to blameWrite a short summary of this reading passage.You can use the stages for scientific research to help you.1.What causes cholera?2.Which theory is correct?3.Think of a method to gather information about the deaths.4.Mark the information on a map to collect results.5.Analyse the results to see if the water is the cause of cholera.6.Find supporting evidence to make sure the conclusion.7.Draw a conclusion and give suggestions John Snow wanted to find the cause of cholera.He believed that people became ill after eating infected food.He used the next outbreak of cholera to test his idea.He studied a small area of houses which got their water from the same pump.Many people in the area died.John Snow showed that this was because the water in the pump was infected.He showed that cholera could be defeated if people drank clean water.。