13. Chih-Ming is an undergraduate student working in the organic chemistry laboratory. He found two compounds with chemical structure labelled on the round flasks from his senior's shelf in the fridge. Those compounds (I and II) are: 


(A) constitutional isomers.
(B) enantiomers.
(C) identical.
(D) diastereomers.
(E) not isomeric.

答案：登入後查看
統計： 尚無統計資料