19.造成馬類肉瘤(equine sarcoid)的病原為:
(A)equine adenovirus
(B)bovine papillomavirus type 1 and 2
(C)equine papillomavirus type 2
(D)equine sarcomavirus
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統計: A(132), B(1530), C(892), D(505), E(0) #2181793
統計: A(132), B(1530), C(892), D(505), E(0) #2181793