题目内容
试举出三类具有抗癌作用植物化学物的代表物质。
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Florence Nightingale
In 1837， to the age of seventeen， Florence Nightingale decided to become a nurse，___51____ horrified her dear mother. In ___52____ days， nurses were little more than doormen， and hospitals were places of dirtiness and ___53____. Nightingale pressed on and in 1853 she became president ___54____ a small London hospital. She went on to the Crimea when war ___55____ there between Britain and Russia. She ___56____ the first of what we now know ___57 ____war hospitals: sanitary，safe， and stocked with supplies. Her tireless ministrations （照料） to the ___58 ____soldiers made her famous all ___59 ____the world. Following the War， Nightingale ___60____ fame and continued to train nurse， ever battling ___61____ what she herself declared "a commonly received idea..， that it requires nothing ___62____ a disappointment in love， or incapacity in other things， to turn a woman ___63____ a good nurse." Since 1921， her birthday ___64____ the centerpiece of National Hospital Week，___65____ in British and American hospitals with special exhibitions， workshops， and publicity drives.
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大蒜中的硫化物多达30种，其中生物活性最强的为()。
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