40.依據血清中和反應,新城病病毒可分為幾種血清型?
(A)1
(B)2
(C)3
(D)4
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統計: A(1445), B(76), C(226), D(211), E(0) #1632816
統計: A(1445), B(76), C(226), D(211), E(0) #1632816