人教版 (2019)选择性必修 第二册Unit 1 Science and Scientists教学ppt课件

这是一份人教版 (2019)选择性必修 第二册Unit 1 Science and Scientists教学ppt课件，共20页。PPT课件主要包含了Part1，Leading-in，Leading in，Part2，Who ，How ，What ，Part3等内容，欢迎下载使用。

While-class
After-class
What d yu knw abut this persn?
Many years ag, a terrible disease named chlera in the wrld killed millins f peple. Peple were very afraid f it, but they didn' t knw what t d. Luckily, a yung dctr decided t find ut hw t prevent and treat the disease. Finally, the dctr wn the battle.
1 severe adj. 极为恶劣的；十分严重的；严厉的搭配 be severe n 对……严厉be severe with neself 严于律己severe weather 恶劣的天气　severe lks 严肃的表情　severe disease 严重的疾病　The prfessr is rather severe n his students. 教授对学生相当严厉。We must be severe with urselves. 我们必须严于律己。
2 nce and fr all 最终地；彻底地The archaelgist will explain the thery fully nce and fr all. 考古学家将彻底地解释这个理论。 The teacher has warned the student nce and fr all. 那位老师已断然警告那个学生。【学法点拨】与 nce and fr all 具有相同含义的短语还有 nce fr all。 I will explain it nce fr all. 我会彻底解释清楚。
3 infectin n. 感染；传染Air，water，clthing and insects are all means f infectin.空气、水、衣服及昆虫都会成为疾病的传染媒介。Ear infectins are cmmn in pre-schl children.耳部感染在学前儿童中很常见。【词语积累】（1）infect vt. 使感染；传染be infected with 感染上……，传染上……Anyne with a bad cld may infect the peple arund him.任何得重感冒的人都可能把疾病传染给周围的人。The severe injuries will sn becme infected.严重的伤口很快就会被感染。Sme peple can be infected with the disease and have mild symptms.有些人可能感染了这种疾病，症状轻微。（2）infectius adj. 感染的，传染性的
4 subscribe vi. 认购（股份）；定期订购；定期交纳（会费）搭配subscribe t 订阅（报纸、杂志等）；签字认可，同意；向……捐赠subscribe fr 预订；认购I wuld like t subscribe t a Dictinary f American Slang.我要订一本《美国俚语词典》。We subscribed t a few jurnals.我们订阅了几本期刊。I was unwilling t subscribe t the cntract，but it seemed that I had n chice. 我不愿在合同上签字，可又似乎别无选择。Only mad peple wuld subscribe t such views.只有疯子才会赞同这种观点。Hw many shares did yu subscribe fr in the new cmpany?你在这家新公司认购了多少股？
5 suspect v. & n.（1）vt. & vi. 怀疑；疑有；不信任搭配 怀疑……有罪 be/as 怀疑……是……The plice suspect him f having taken the mney.警察怀疑钱是他偷的。I suspected him t be a liar. 我料想他是一个说谎者。The plice dn’t knw wh cmmitted the crime，but they suspect Jnes. 警察不知道谁作的案，但他们怀疑琼斯。（2）n. 犯罪嫌疑人；可疑对象The plice culdn’t prve the suspect’s guilt.警察不能证实嫌疑犯的罪行。
Read the title and predict.
Jhn Snw Defeats “King Chlera”
Jhn Snw desired t destry chlera.
Jhn Snw decided t prve the secnd thery.
Snw began his study by marking n the mapand the prcess.
Truth f the infectin f chlera
Snw's cntributins
Read the passage quickly and get the main idea f each paragraph.
Skimming: main idea f each paragraph
1. What caused the utbreak f chlera in Lndn in 1854?The water which came frm the River Thames and had been infected by waste.
Para. 4: The truth was that the water frm the Brad Street pump had been infected by waste. … Sme cmpanies sld water frm the River Thames that was plluted by raw waste.
Task3.Read Para.4 and 5 carefully t answer the fur questins.
2. Was chlera destryed cmpletely?N.
Para. 5: Thrugh Snw’s tireless effrts, water cmpanies began t sell clean water, and the threat f chlera arund the wrld saw a substantial decrease. Hwever, chlera is still a prblem. Each year, millins f peple arund the wrld get chlera and many die frm it. …
3. Why was Jhn Snw cnsidered the father f mdern epidemilgy?
1. He helped peple knw hw t prevent chlera . 2. He transfrmed the way scientists study diseases in use f map and statistics.
Para. 5:… Frtunately, we nw knw hw t prevent chlera, thanks t the wrk f Jhn Snw. Mrever, in his use f maps and statistics, Snw transfrmed the way scientists study diseases.
4. Hw can we prevent chlera?By drinking pure r biled water.
Para. 4: The truth was that the water frm the Brad Street pump had been infected by waste. … The peple wh drank this water were much mre likely t get chlera than thse wh drank pure r biled water.
In ur daily life, in rder nt t get infected with the infectius disease, such as chlera, AIDS, SARS,what shuld we d？
Wash hands ften
chse fresh sea fd
Keep the kitchen clean
deal with rubbish prperly.
Drink biled water
Dn't frget t wear a mask when yu g ut.
Discussin: Critical Thinking