問題詳情
23. What ions are very important for the proper functioning of biologic systems, such as nerves and muscles?
(A) alkali metal ions
(B) nitrogen ions
(C) oxygen ions
(D) sulfur ions
(E) alkaline earth metal ions
參考答案
答案：99
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中