【正文】 Step V Group discussionAnswer the questions (Finish exercise 2 on Page 3)1. John Snow believed Idea 2 was right. How did he finally prove it? (John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.)2. Do you think John Snow would have solved this problem without the map? (No. The map helped John Snow organize his ideas. He was able to identify those households that had had many deaths and check 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.)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.)Step VI Using the stages for scientific research and write a summary.Period 2amp。3 Language focusStep I Warming up1. characteristic ① n. a quality or feature of sth. or someone that is typical of them and easy to ；特性 What characteristics distinguish the Americans from the Canadians.② a. very typical of a particular thing or of someone’s characer 典型性的， Such bluntness is characteristic of him.Windy days are characteristic of March. [辨析]characteristic與character找教案 characteristic是可數(shù)名詞，意為“與眾不同的特征“character表示（個(gè)人、集體、民族特有的）“性格、品質(zhì)”，還意為“人物；文字”What you know about him isn’t his real character.2. put forward: to state an idea or opinion, or to suggest a plan or person, for other people to consider提出 He put forward a new theory.The foreigners have put forward a proposal for a joint venture.An interesting suggestion for measuring the atmosphere around Mars has been put forward.☆ put on穿上。戴上。增加 put out熄滅(燈)。撲滅 (火) put up with…忍受 put down寫(xiě)下來(lái)。放下； put off 耽誤。 延期 put up建立。 建造, put up舉起，搭建，粘貼3. analyze: to examine or think about something carefully in order to understand it 、檢討、細(xì)察 A puter analyses the photographs sent by the satellite.The earthquake expert tried to analyze the cause of the earthquake occurred on May 12,2008. Let’s analyze the problem and see what went wrong. He analyzed the food and found that it contained poison. We must try to analyze the causes of the strike.☆ analysis ，解析，分解4. conclude: decide that sth. is true after considering al the information you have 得出結(jié)論；推論出 to end sth. such as a meeting or speech by doing or saying one final thing vt. amp。 vi結(jié)束，終止； We concluded the meeting at 8 o’clock with a prayer. From his appearance we may safely conclude that he is a heavy smoker. What do you conclude from these facts? We conclude to go out / that we would go out.conclusion arrive at a conclusion。 e to a conclusion。 draw a conclusion。 reach a conclusion What conclusion did you e to / reach / draw / arrive at? From these facts we can draw some conclusions about how the pyramids were built.Step 2 Reading1. defeat ① vt. to win a victory over someone in a war, petition, game ，戰(zhàn)勝，使受挫I’ve tried to solve the problem, but it defeats me!Our team defeated theirs in the game.② ，輸 failure to win or succeedThis means admitting defeat.They have got six victories and two defeats.[辨析]win, beat與defeat① win “贏得”賽事、戰(zhàn)事、某物；后接人時(shí)，意為“爭(zhēng)取贏得…的好感或支持；說(shuō)服”② beat “戰(zhàn)勝”“擊敗”比賽中的對(duì)手，可與defeat互換We beat / defeated their team by 10 scores.They won the battle but lost many men.The local ball team won the state championship by beating / defeating all the other teams.I can easily beat /defeat him at golf.He is training hard to win the race and realize his dream of being a champion at the 2008 Olympic Games.2. expert ① n. someone who has a special skill or special knowledge of a subject專(zhuān)家，能手 an expert in psychology an agricultural expert ② a. having special skill or special knowledge of a subject熟練的，有專(zhuān)門(mén)技術(shù)的 an expert rider an expert job需專(zhuān)門(mén)知識(shí)的工作 He is expert in / at cooking. 找教案 3. attend vt. amp。vi 參加，注意，照料① be present at參加attend a ceremony / lecture / a movie / school / class / a meeting I shall be attending the meeting.Please let me know if you are unable to attend the conference.② attend to (on): to look after, care for, serve伺候, 照顧，看護(hù)The queen had a good doctor attending on her. Dr Smith attended her in hospital. 治療 Are you being attended to?接待Mother had to attend to her sick son.③ attend to處理，注意傾聽(tīng) attend to the matter A nurse attends to his needs. Can you attend to the matter immediately?I may be late – I have got one or two things to attend to.Excuse me, but I have an urgent matter to attend to.[辨析]attend, join, join in與take part in① attend指參加會(huì)議、上課、上學(xué)、聽(tīng)報(bào)告等② join 指加入某組織、團(tuán)體，成為其中一員③ join in指加入某種活動(dòng)；表示與某人一起做某事join sb. in sth.④ take part in指參加正式的、有組織的活動(dòng)，切在活動(dòng)中起積極作用Only 2 people attended the meeting.He joined the Communist Youth League in 2007.Will you join us in the game?We often tale part in the afterclass activities.4. expose : to show sth. that is usually covered暴露 expose sth. to the light of day 把某事暴露于光天化日之下 I threatened to expose him ( to the police). 我威脅要(向警察)揭發(fā)他. He exposed his skin to the . The old man was left exposed to wind and rain.When he smiled he exposed a set of perfect white teeth.5. cure vt. amp。 n. to make someone who is ill well agian治療,痊愈When I left the hospital I was pletely cured.①cure sb of a diseaseWhen you have a pain in your shoulders, you will go to see a doctor. The doctor will cure you. The only way to cure backache is to rest.He will cure the pain in your shoulders When I left the hospital I was pletely cured. The illness cannot be cured easily.Although the boy was beyond cure, his parents tried to cure him of bad habits.②a cure for a diseaseAspirin is said to be a wonderful cure for the pain. There