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    Fleming discovered penicillin almost by . A. experiment B. hand C. accident D. theory 【查看更多】

     

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     Fleming discovered penicillin almost by______.

    A. experiment           B. hand           C. accident      D. theory

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    Fleming discovered penicillin almost by______.

    A．experiment

    B．hand

    C．accident

    D．theory

     

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