問題詳情

47. Purine is a heterocyclic aromatic organic compound that consists of a pyrimidine ring fused to_________ ring. 
(A) benzene
(B) ribose
(C) imidazole
(D) furan
(E) pyrazole

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增