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2.John Snow Defeats King Cholera

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Who used peas to show how physical characteristics are passed from parents to their children? He was Gregor Mendel

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Who discovered radium? She was Marie Curie

She received two Nobel prizes, one for physics (1903) and one for chemistry (1911). She is the only person to have been so honored.

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Who invented the way of giving electricity to everybody in large cities? He was Thomas Edison He was an America inventor.

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Who invented a lamp to keep miners safe underground? He was Humphry Davy
Before his invention, there had been many accidents when candles on the miners helmets had exploded when it came into contact with underground gas.

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Who put forward a theory about black holes? Stephen Hawking He is … He has worked in astronomy and studied black holes in space.


…… They all got great achievements in science. In their scientific research, they always put forward some new ideas. Do you how they prove them?

York John Snow Defeats “King Cholera”

1. Who was John Snow? He was a famous doctor in London in 19th century. 2. What was cholera? This was the deadly disease of its day.

Snow and how he The text is mainly about John _________ defeated cholera __________.

draw a conclusion think of a method

Please put the 7 stages in right order according to the passage.

collect results make a question

find a problem analyse the results
Find supporting evidence

Stage 1
Stage 2 Stage 3

find a problem
make a question think of a method

Stage 4
Stage 5 Stage 6 Stage 7

collect results
analyse the results find supporting evidence draw a conclusion

Para 1 What problem did John Snow find?

Cholera was the deadly disease of its day. Neither its cause nor its cure was understood.

What’s the cause of cholera?

Para2 :Make a question: two theories

1. Cholera multiplied in the air. A cloud of dangerous gas floated around until it found its victims.
2. People absorbed it with their meals.

Para3 :Think of a method

John Snow began his enquiry in two street where the outbreak was very severe.

Para 4: What results did John collect?

1. Which houses had had many deaths? 2. Which house had had no death? 3. What were many of the deaths near?

Public house

Many deaths happened here.

No death happened here.

Many of the deaths were near a water pump.

Para5: analyze the results:
What happened to the pump water?
The water was from the river which had been polluted by the dirty water from London.

Find supporting evidence: What extra evidence did he find?
A woman and her daughter who lived far away but drank the water also died.

Draw a conclusion with certainty

The polluted water carried the virus.


Para. 7

He suggested that the source of all water supplies be examined ______________and instruct the water company not to expose _______people to polluted water any more.

What qualities do you think a scientist should have?
Good observation Perseverance Careful


Strong determination

Clever and strict

Unit 1 Great Scientists
Language points

? 1. But

he become inspired when he thought about helping ordinary people exposed to cholera.
过去分词做定语修 饰名词,表示被动。

? Neither its cause nor its cure was understand. ? Neither…nor…引导并列主语,当 neither…nor…引导两个名词或代词做主语时 ,谓语动词遵循就近一致原则,即谓语动 词要与最近的那个名词或代词保持一致。 ? 同理还有either…or…, not only…but also…, not…but… B to attend ? Either you or one of your students ___ the meeting that is due tomorrow. ? A. are B. is C. have D. be

? So many thousands of terrified people died every time there was an outbreak. ? every time 是名词词组,可引导时间状语从 句,意为“每次、每当” ? 其它引导时间状语从句的time词组有: ? the first/second/last time ? any/next/each time ? The first time he came to the city, he decided to settle here. ? Do pay us a visit next time you are in Chongqing.

? He found that it came from the river polluted by the dirty water from London.
过去分词做定语修 饰名词,表示被动。

? have sth done ? 让某事被做,遭遇某事,做事的主体是“别人” 而非主语自己。 ? I will have my bike repaired. ? 我要去修理自行车。 ? She had her watch stolen. ? 她手表被人偷了。 ? 【拓展】 ? have sb do sth 让某人做某事 ? The teacher has him mend the broken door. ? have sb doing sth 让某人一直做某事 ? Who has him standing over there?

? (1) Jenny hopes that Mr. Smith will suggest a good way to have her written English ______ in a A short time. ? A. improved B. improving C. to improve D. improve ? (2) The director had her assistant ____ c some hot dogs for the meeting. ? A. picked up B. picks up ? C. pick up D. picking up

? ? ? ?
? ? ? ?

suggest (1) 暗示,表明 宾语从句用陈述语气 His work suggests that he is a careful man. The look on his face suggested that he was every happy. (2) 提出;建议 宾语从句用虚拟语气 搭配:suggest + n./doing/that 从句 She suggested going to the zoo with the child. He suggested that the work (should) be started at once.

? 某些表示“建议、命令、要求、坚持”的动词后 面接宾语从句时,从句要用虚拟语气,从句中的 谓语动词用“should +动词原形”,should可省略 。这类动词主要有几个: ? 一个“坚持”(insist) ? 两道“命令”(order, command) ? 四条“建议”(suggest, advise, propose, recommend) ? 五点“要求”(ask, demand, desire, request, require )



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