6.下列何者最罕見由蚊蟲媒介傳播?
(A)porcine reproductive and respiratory syndrome virus
(B)Mycoplasma suis
(C)Ascaris suum
(D)Japanese encephalitis virus
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統計: A(330), B(242), C(1093), D(170), E(0) #2969930
統計: A(330), B(242), C(1093), D(170), E(0) #2969930