20．对尼古丁和苯并a芘的分子组成与结构 的描述正确的是 A．尼古丁是芳香族化合物 B．苯并a芘的分子中含有苯环是苯的同系物 C．尼 Sketch Coloring Page

20．对尼古丁和苯并a芘的分子组成与结构 的描述正确的是 A．尼古丁是芳香族化合物 B．苯并a芘的分子中含有苯环是苯的同系物 C．尼 Template

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