以下为课件内提取的文本内容，仅供参考：

Unit 1 Great Scientists

Do you know the great scientists?

1.Who invented the first modern steam engine?

James Watt

(瓦特)

2.Who discovered radium?

Madame Curie

3. Who is the inventor of electric light bulb(电灯)?

Thomas Edison

4.Who invented the earliest instrument to tell people where earthquakes happened?

Zhang Heng

5.Who is the father of super hybrid rice?

Yuan Longping

6. Do you know who defeated “King Cholera”?

John Snow

John Snow is a well-known doctor in the 19th century in London and he defeated “King Cholera”.

Do you know what kind of disease is cholera?

It is a kind of terrible disease caused by drinking dirty water and it caused a lot of deaths in the old times and it was very difficult to defeat.

Let’s get to know how Dr. John Snow defeated “King Cholera” in 1854 in London in this reading passage:

John Snow Defeats “King Cholera”

John Snow Defeats “King Cholera”

The passage is written as a report of an experiment and there are 7 steps:

1.Find a problem:(发现问题)

2.Make up a question:(形成研究主题)

3.Think of a method:(找出研究方法)

4.Collect results:(收集材料)

5.Analyse results:(分析材料)

6.Repeat if necessary:(必要时重新分析)

7.Draw a conclusion:(得出结论)

John Snow Defeats “King Cholera”

Read the passage and fill in this form: (in 15 minutes)

John Snow Defeats “King Cholera”

What causes cholera?

Which theory is correct?

Collect information on those who were ill or died and where they got their water

Mark information on a map to find out where people died or did not died

Analyse the water to see if that is the cause of the illness

Find other evidence to make sure the conclusion

The water is to blame. The source of all drinking water should be examined.

Read the passage again and finish Ex. 1(Page 3). (in 8 minutes)

John Snow Defeats “King Cholera”

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 defeated cholera by examining the water supply and dealing with the polluted water

Read the passage again and fill in the blanks:

John Snow was a well-known ____ in London in the ___ century. He wanted to find the ______ of cholera in order to ______ it. In 1854 when a cholera ____ out, he began to gather information. He _____ on a map where all the dead people had lived and he found that many people who had drunk the dirty water from the ______ died. So he decided that the polluted water carried cholera. He suggested that the _____ of all water supply be _______ and new methods of ________ with polluted water be found. Finally, “King Cholera” was defeated.

doctor

19th

cause

defeat

broke

marked

pump

source

examined

dealing

(in 5 minutes)

Retell the passage according to below:

John Snow was a well-known ____ in London in the ___ century. He wanted to find the ______ of cholera in order to ______ it. In 1854 when a cholera ____ out, he began to gather information. He _____ on a map where all the dead people had lived and he found that many people who had drunk the dirty water from the ______ died. So he decided that the polluted water carried cholera. He suggested that the _____ of all water supply be _______ and new methods of ________ with polluted water be found. Finally, “King Cholera” was defeated.