英語必修ⅴ牛津譯林版unit2課件共25張pptwelcome-資料下載頁
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【導(dǎo)讀】healthy?do?worse.discovered?andChainshare?In1928.medicine.penicillin.page20.1.In1897.ago.bythinningblood,bacteria.causedbybacteria.workasamedicine.tobeeffective.Reducingfever. Helpingstoppain. Preventingstrokes
【正文】 enicillin: In 1928: In 1940: In 1944: Development of Penicillin: In 1928: discovered by Alexander Fleming In 1940: made and tested in large quantities In 1944: mass production began Effects of aspirin Effects of penicillin Effects of aspirin ? Reducing fever ? Helping stop pain ? Reducing the risk of heart attacks ? Preventing strokes ? Reducing the risk of some cancer ? Increasing the length of people’s lives ? Helping with diabetes Effects of penicillin ? Treating illnesses caused by bacteria
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