2.某尿液樣品屮測得pH値爲6.8，試問此數値相當於下列何値？
(A)[H+] = 1.58 x 10-7
(B)[H+] = 1.58 x 10-6
(C)[H+] = 1.58 x 10-5
(D)[H+] = 1.58 x 10-4

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統計： A(107), B(18), C(4), D(0), E(0) #1088357