複選題
48.下列哪些物質為純物質?
(A)黃銅
(B)臭氧
(C)水銀
(D)乙醇
答案:登入後查看
統計: A(73), B(396), C(425), D(302), E(0) #1967458
統計: A(73), B(396), C(425), D(302), E(0) #1967458