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1、A medical student was called on to state how much of a certain drug he would give to a patient. He promptly replied: "Five grains." A minute later the student asked the professor, … https://www.ihuanxiong.cn/3423.html
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1、A medical student was called on to state how much of a certain drug he would give to a patient. He promptly replied: "Five grains." A minute later the student asked the professor, … https://www.ihuanxiong.cn/3423.html
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