皮皮学，免费搜题
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【单选题】
苯巴比妥可与吡啶和硫酸铜溶液作用,生成A.
绿色络合物
B.
紫堇色络合物
C.
白色胶状沉淀
D.
氨气
E.
红色
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皮皮学刷刷变学霸
举一反三
【简答题】A．They are difficult to read. B．They are slowly falling apart. C．They were not made from wood pulp. D．They should be stored in a cold place.
【简答题】S7-200PLC定时器的PT值最大可设数值为多少
【简答题】A．They are difficult to read. B．They are slowly falling apart. C．They were not made from wood pulp. D．They should be stored in a cold place
【简答题】A．They are difficult to read. B．They are slowly falling apart. C．They were not made from wood pulp. D．They should be stored in a cold place.
【简答题】A．They are difficult to read. B．They are slowly falling apart. C．They were not made from wood pulp. D．They should be stored in a cold place.
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