对尼古丁和苯并a芘的分子组成与结构描述正确的是 A.尼古丁为芳香族化合物 B.苯并a芘的分子式为c20h18 C.苯并a芘分子中 Template




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tomski对尼古丁和苯并a芘的分子组成与结构描述正确的是 a.尼古丁为芳香族化合物 b.苯并a芘的分子式为c20h18 coloring