19. Which of the following is the best reducing agent? 
(A) Cl-
(B) Cl2
(C) H2
(D) Mg
(E) Mg2+
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統計: 尚無統計資料
統計: 尚無統計資料
19. Which of the following is the best reducing agent? 
(A) Cl-
(B) Cl2
(C) H2
(D) Mg
(E) Mg2+