Unit 4 Reading 第一课时课件-2022-2023学年高一下学期英语牛津译林版（2020）必修第三册

Pre-reading 马齿苋purslane 蒲公英dandelion 青蒿southernwood 黄花蒿Artimesia annua While-reading Oct.4th,1971 2015 Qinghao extract the Nobel Prize WHEN A news report A lead 新闻导语、简讯 A lead important information reason Part1--Para.1★★ Part2--Para.2★★ Topic sentence Para.2 Para.3 Transitional sentence (过渡句） Tu’s education was soon to prove very useful. In the 1960s, many people were dying of malaria, and in 1969 Tu became head of a team that intended to find a cure for the disease. She collected over 2,000 traditional Chinese medical recipes for malaria treatment and made hundreds of extracts from different herbs. When they failed to produce any promising results, Tu referred to the ancient books of traditional Chinese medicine again. Inspired by a 1,700-year-old text about preparing qinghao with cold water, Tu redesigned the experiments and tried extracting the herb at a low temperature in order not to damage its effective part. On 4 October 1971, after 190 failures, she succeeded in making a qinghao extract that could treat malaria in mice. Para.3★★ transitional sentence 过渡句 What efforts had Tu made before successfully making qinghao extract? Para.4--6 Group work Transitional sentence (过渡句） However, it was hard to produce enough qinghao extract for large trials because research resources and good equipment were limited.Tu and her team managed to find solutions to the problem. When there was no research equipment, they had to put qinghao into household water containers. They worked day and night and their health began to suffer because of the poor conditions, but they never gave up. Para.4★★★★ transitional sentence Even with large amounts of the qinghao extract produced, however, they still faced another problem. The trials on real patients were likely to be postponed because they did not have sufficient data. To speed up the process and ensure its safety, Tu and her team volunteered to test the qinghao extract on themselves first. Para.5★★★ transitional sentence The efforts of