1.下列何者為豬離乳後多系統消耗症(postweaning multisystemic wasting syndrome)的主要病
原?
(A)Porcine picornavirus
(B)Porcine parvovirus
(C)Porcine circovirus
(D)Porcine coronavirus
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統計: A(65), B(23), C(1413), D(82), E(0) #855821
統計: A(65), B(23), C(1413), D(82), E(0) #855821