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第二信使的化学本质是（）
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第二信使的化学本质是（）
A.糖蛋白
B.小分子物质
C.RNA
D.DNA
正确答案：小分子物质
Tag：
人体及动物生理学
物质
分子
时间：2023-12-29 22:27:25
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