8.成牛感染何種病毒時,會引起牛白血病(bovine leukosis)?
(A)leukemia virus
(B)coronavirus
(C)enterovirus
(D)calicivirus
答案:登入後查看
統計: A(2984), B(129), C(58), D(27), E(0) #1739199
統計: A(2984), B(129), C(58), D(27), E(0) #1739199