48.牛接觸傳染性胸膜肺炎主要由下列何種病原引起?
(A)Mycoplasma bovis
(B)Mycoplasma bovigenitalium
(C)Mycoplasma mycoides subsp. mycoides SC variant
(D)Mycoplasma dispar
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統計: A(459), B(51), C(1665), D(13), E(0) #1588629
統計: A(459), B(51), C(1665), D(13), E(0) #1588629