阿摩線上測驗
2. The structural formula for vitamin C is shown below, identified by H which is most acidic?
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
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統計： A(0), B(0), C(3), D(18), E(5) #1026887
統計： A(0), B(0), C(3), D(18), E(5) #1026887
