北师大版高中英语选修七unit21humanbiologylesson3教学课件

北师大版高中英语选修七unit21humanbiologylesson3教学课件内容摘要：

__, and ____________. However, as the illness progresses, most patients eventually ________ pneumonia . SARS virus _______ mainly by close ______________, either through the air or________________. symptoms body aches headaches develop spreads human contact surfacetouching Part 4 Treatment there were no _________ ______ or ________ to treat it and doctors were not sure how to _______ it either. Since most people had no natural ________ against the disease, it was also _______ to the doctors and nurses treating SARS patients. prescription tablets prevent defences harmful drugs Part 5 Measures have been doing _____ on treatments to _______ any future outbreaks . ________ technology and _______ research techniques allow health experts all over the world to ______ , _______ knowledge , and ______ together without ______ to help put SARS behind us. trials prohibit munication medicalunite share work pause Part 2: Part 3: Part 4 The SARS epidemic began in 2020 with a lung disease in Guangdong Province 8000 cases were reported in over 30 countries across five different continents and 774 people died . Generally, SARS symptoms include a high fever, body aches, and headaches. However, as the illness progresses, most patients eventually develop pneumonia. The SARS virus spreads mainly by close human contact, either through the air or surfacetouching. there were no prescription drugs or tablets to treat。