問題詳情

46. The two nitrogen atoms in urea arise from______.
(A) ammonia and glutamine
(B) glutamine and aspartic acid
(C) glutamine and glutamic acid
(D) glutamic acid and alanine
(E) ammonia and aspartic acid

參考答案

答案：E
難度：計算中-1
書單：沒有書單，新增