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1、Unit 1 Great scientistsStep1Step2Step3Step4Step5Section Warming Up & Reading Pre-readingYuan Longping is a great scientist. How did he make great contributions to the world？Please read the following passage to get the answer. Yuan Longping， known as the “Father of Hybrid Rice (杂交水稻交水稻)”， realized on
2、e of his 80th birthday wishes recently. His super grain brought yields (产量量) of 13.9 tons of rice per hectare (公公顷)， or 926.6 kilograms per mu (1/15 hectare). This set a new world record for rice output. “I was very happy as it was very difficult to produce such a high yield of rice，” Yuan said at a
3、 news conference on September 19， 2011. The rice breed， DH2525 (Y two superior No 2)， was tested in Longhui county in Hunan province. Yuan s team produced 10.5 tons of rice per hectare in 2000. In 2004 they produced 12 tons of rice per hectare. Both times they set a world record. China plants about
4、29 million hectares of rice every year. It has an average (平均的平均的) output of 6.3 tons per hectare， according to the National Bureau of Statistics. Hybrid rice is produced by crossbreeding different varieties of rice.Yuan developed the first Chinese hybrid rice variety in 1974. His earlier hybrid ric
5、e has been planted in India， Vietnam and the US. A total of three million hectares of land are covered by the rice. Yuan said that an additional 75 million hectares would be enough to feed 400 million to 500 million people.1.Match the pictures and the proper introductions.(1)a He was awarded the 201
6、0 Nobel Prize in Physiology or Medicine “for the development of in vitro fertilization(体外受精体外受精)”. The British biologist s work led to the birth of the first testtube baby， Louise Brown， on 25 July， 1978.(2)f She was a physicist and chemist born in Poland. She discovered radium in 1898 and received
7、two Nobel Prizes， one for physics and the other for chemistry.(3)b He is a ChineseAmerican citizen， whose Chinese name is Gao Kun. He won half the prize for his research that led to a breakthrough in fiber optics (光光纤) and is called “Father of fiber optics”.(4)d He is an American inventor. He invent
8、ed the way of giving electricity to everybody in large cities.(5)e He is a British scientist. He worked in astronomy and put forward a theory about black holes.2.Look at the pictures and write down what diseases people have faced in the past few years.(1) (2) (3) (4) Cholera(霍乱霍乱)SARS(传染性非典型肺炎染性非典型肺
9、炎)Bird Flu(禽流感禽流感)Influenza A(H1N1)(甲型甲型H1N1流感流感)1.Read the text quickly and complete the main idea of it.The text tells that how John Snow found the (1) of the disease and finally “King Cholera” was (2) .causedefeated2.Scan the text and then choose the best answer according to the text.(1)The passa
10、ge mainly tells us that . A.the cause of cholera was polluted water B.John Snow was a wellknown doctor in London C.the source of all the water supplies should be examined D.John Snow did some research and helped to solve “King Cholera”答案：答案：D(2)Which of the following theories did John Snow believe？
11、A.Cholera multiplied in the air without reason. B.People spread the disease when speaking to each other. C.People absorbed the disease into their bodies， were affected and died. D.People were too dirty.答案：答案：C(3)What does the word “this” in the sentence “He had not foreseen this” in the 23rd line re
12、fer to？ A.The outbreak of cholera. B.The cause of the disease. C.The no deaths in some areas. D.The water pump in Broad Street.答案：答案：C(4)What was the key help for John Snow s discovery？ A.The government. B.The woman moving away from Broad Street. C.The water company. D.The map made by himself.答案：答案：
13、D(5)At last，“King Cholera” was controlled by . A.using medicines in hospitals B.driving patients out of the country C.dealing with the polluted water D.getting rid of all kinds of pollution答案：答案：C1.Read the text carefully and then fill in the blanks.John Snow Defeats “King Cholera”About choleraIt wa
14、s a (1) disease of its day.People didn t know its cause or its (2) .Many thousands of people died every time there was an outbreak.deadlycureTwo (3) Cholera was spread in a cloud of gas. .Cholera was spread by germs.John Snow s opinionCholera was spread by germs.theoriesThe course of finding evidenc
15、eAs the disease spread quickly through poor (4) of London， he began to gather information.He found the outbreak was particularly (5) in two streets.After further investigations he discovered it seemed that the water was to (6) .When people didnt use the (7) water， the disease slowed down， which show
16、ed that cholera was really spread by germs.neighbourhoods severeblamepolluted(8) to prevent cholera from happeningJohn Snow suggested that the (9) of all the water supplies be examined.The water companies were (10) not to expose people to polluted water any more.Measuressourceinstructed2.Find out th
17、e sentences in the text which have similar meanings to the following ones.(1)So whenever cholera broke out， it would cause quite a few terrified people to lose their lives.(2)He understood that only after he discovered what led to the disease could he control it.答案：答案： So many thousands of terrified
18、 people died every time there was an outbreak.答案：答案： He knew that cholera would never be controlled until its cause was found.答案：答案： He became interested in two theories that possibly explained how cholera killed people.(3)Two theories interested him that explained how cholera caused so many deaths.
19、Fill in the blanks according to the text. John Snow a doctor， 1. Queen Victoria as her personal 2. .But he was willing to help ordinary people 3. cholera.Many people died 4. there was an 5. .He wanted to face the 6. and solve the problem.attendedphysicianexposed toevery timeoutbreakchallengeTwo theo
20、ries caught his attention.The first suggested that cholera multiplied in the air.The second suggested that people 7. this disease into their bodies and the disease 8. the body.John Snow 9. that the second was right but he needed evidence.When another outbreak hit London in 1854， he was ready to begi
21、n his 10. and tried to get information.absorbedattackedsuspectedenquiry He found that most of the deaths were near a water pump and the spread of the disease was 11. water.With the evidence， he was able to 12. that polluted water carried the virus.After that， he suggested the source of all the water
22、 supplies 13. . Finally “King Cholera” was 14. .linked toannouncebe examineddefeatedDo you think John Snow would have solved this problem without the map？参考答案：参考答案：No.The map helped John Snow organize his ideas.He was able to identify those households that had had many deaths and checked their waterdrinking 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.
