68.下列何者寄生於魚類會引起鰓部軟骨瘤?
(A)Dactytogyrus sp.
(B)Piscicola sp.
(C)Centrocestus formosanus
(D)Trichodina sp.
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統計: A(410), B(289), C(1652), D(222), E(0) #2406548
統計: A(410), B(289), C(1652), D(222), E(0) #2406548