2.下列何者為引起豬隻血球凝集性腦脊髓炎(hemagglutinating encephalomyelitis)之致病原?
(A)porcine circovirus
(B)coronavirus
(C)paramyxovirus
(D)herpesvirus
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統計: A(245), B(2305), C(264), D(163), E(0) #1839510
統計: A(245), B(2305), C(264), D(163), E(0) #1839510