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高二必修5 Unit 1英语教学课件ReadingWarming Up There are some great scientific achievements that have changed the world. Can you name some of them? What kind of role do they play in the field of science? Do these achievements have anything in common? Match the inventions with their inventors below before you answer all these questions. Alexander Bell electricity

Thomas Edison the First telephone

Laite Brothers the electric Lamp

Madame Curie black holes in Universe

Franklin Theory of Gravity

Steven Hawking the First Plane

Elbert Einstein Radium

Isaac Newton the Theory of RelativityWho is he?He is … Archimedes (阿基米德)Which scientist discovered that objects in water are

lifted up by a force that helps them float?Charles Darwin.Who is he?He is … Who wrote a book explaining how animals and plants developed as the environment changed?Thomas Newcomen.Who is he?He is … Who invented the first steam engine?Gregor MendelWho is he?He is … Who used peas to show how physical characteristics are passed from parents to their children?Marie CurieWho is he?He is … Who discovered radium?Thomas EdisonWho is he?He is … Who invented the way of giving electricity to everybody in large cities?Leonardo da VinciWho is he?He is … Who was the painter that studied dead bodies to improve his painting of people?Humphry DavyWho is he?He is … Who invented a lamp to keep miners safe underground?张衡Who is he?He is … Who invented the earliest instrument to tell people where earthquakes happened? Stephen HawkingWho is he?He is … Who put forward a theory about black holes?Lead-in Supply the following words with detail.

John Snow

CholeraJohn Snow(1813-1858) John Snow was born in York on March 15th, 1813, the oldest of nine children.York

London His father worked as a laborer. While poor, his parents were determined to give their children whatever educational opportunities they could afford. He was educated at a private school in his native city until the age of fourteen, when he was apprenticed(当学徒) to William Hardcastle, a surgeon(外科医生) living at Newcastle-on-Tyne.After serving for a short time as a surgeon and unqualified assistant during the cholera epidemic of 1831-1982, he became in October 1836 a student at the Hunterian School of medicine in Great Windmill Street, London. He began to attend the medical practice at the Westminster Hospital in the following October.He graduated M.D. of the University of London on 20 Dec. 1844, and in 1850 he was admitted a licentiate of the Royal College of Physicians. He designed a chloroform inhaler(氯仿吸入器), described in his book, On Chloroform and other Anesthetics, published in 1858. Dr. Snow was also a prominent anesthesiologist(麻醉师)What else was he famous for?What is Cholera? Cholera is the illness caused by a bacterium called Vibria cholerae. It infects people’s intestines(肠), causing diarrhea(腹泻), vomiting(呕吐) and leg cramps(小腿抽筋). The most common cause of cholera is by someone eating food or drinking water that has been contaminated with the

bacteria. After a disaster, this is a very real danger, since regular, clean water and food supplies are often unavailable. The disease can be spread even further by infected people using already dirty water sources to clean themselves or dispose of waste. Cholera can be mild or even without

symptoms, a severe case can lead to

death without immediate treatment. The

diarrhea and vomiting brought on by the

infection quickly leaves the body without

enough fluid. The following

dehydration(脱水) and shock can kill a

person within hours. Look at the picture, the title and the map, guess what the content of the text is. Then skim it quickly to see if you are right. When we want to solve some problem. First we should find the problem, do some research on it, prove your finding, and then make a conclusion. This is a scientific and objective way of researching.1. What order would you put the seven in?Pre-readingPlease put the

7 stages in right order according to the passage. Infectious diseases can be spread to

other people. They have an unknown

cause and need public health care to

solve them.2. What do you know about infectious diseases?Repel (回避) may be exposed to an infectious diseases, so may animals, such as bird flu. AIDS, SARS are infectious diseases.

Infectious diseases are difficult to cure. Cholera is the illness caused by a bacterium called Varian cholera. If infects people’s intestines(肠胃), causing diarrhea(腹泻), vomiting(呕吐) and leg cramps (小腿抽筋).3. What do you know about cholera?The most common cause of cholera is by someone eating food or drinking water that has been contaminated(污染) with the bacteria. Cholera can be mild(不严重的) or

even without symptoms(症状), but a

severe case can lead to death without

immediately treatment.Germany

Great BritainDeath of first cholera case in London during the 1848-49 epidemic LondonPrevious cholera epidemic in Great Britain in 1831-32The spread of choleraJohn Snow Defeats “King Cholera”What is the problem?Cholera was the deadly disease of its day. Neither its cause nor its cure

was understood.What’s the cause of cholera?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.Broad StreetMany deaths happened here.No death happened here.The water from the pump was to blame.Public houseSmall, white, flocculent particlesThe 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 certaintyThe polluted water

carried the virus.I. Read the text carefully and fill in the blanks.Many people died of cholera.John Snow tried to find out its _____ and ____ People drank water from the pump in ______ Street.Most died.causecureBroadComprehending Families were given free beer in the pub at __________ Street.People removed the ______ from the water pump.People had no________ The disease ___________Cambridgedeathshandleslowed down_______ water carried the disease.Theory 2 that people ________ the disease with their meals proved right. And theory 1 was wrong.________ the source of all the water supplies.PollutedabsorbedExamineII. True (T) or false (F):1. Cholera would never be controlled even if its cause was found.

2. The disease attacked the body quickly from the stomach and soon the affected person died.

3. John Snow began to collect the information before the disease spread. F T F 4. In two particular streets, 500 people died in 10 day 内容过长，仅展示头部和尾部部分文字预览，全文请查看图片预览。 ify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause.3. Cholera is a 19th century disease. What disease do you think is similar to cholera today?

Two diseases, which are similar today, are SARS and AIDS because they are both serious, have an unknown cause and need public health care to solve them.[文章尾部最后500字内容到此结束,中间部分内容请查看底下的图片预览]

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