江苏省太仓市英语译林牛津版选修7U2同步教案（背景资源）
Section 1 A text structure analysis of Two life-saving medicines
I. Summary of Two life-saving medicines
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Main idea of the passage
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The history and the uses of two life-saving medicines: aspirin and penicillin.
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Main idea of Part 1 (paragraph 1)
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A simple introduction of the two medicines.
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Main idea of Part 2 (paragraph 2-3)
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The history and the uses of aspirin.
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Main idea of Part 3 (paragraph 4-5)
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The history and the uses of penicillin.
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