27.pH值之範圍為何?
(A)(-7)-(-1)
(B)(16)-(28)
(C)(1)-(14)
(D)(30)-(45)
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統計: A(1), B(1), C(38), D(0), E(0) #1206493
統計: A(1), B(1), C(38), D(0), E(0) #1206493