青霉素和头孢菌素都具有旋光性,因为青霉素分子中含有_个手性碳原子,头孢菌素分子含有个_手性碳原子。
3,2
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Could you imagine your parents choosing your husband or wife for you? And can you imagine not setting eyes on him or her until your wedding day? This situation is common in India, the Middle East and many parts of Africa. Marriage c
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