A.失去凝血特性B.失去免疫原性C.失去干擾現(xiàn)象D.失去感染性
A.自生合成B.宿主細(xì)胞膜或核膜C.宿主細(xì)胞膜D.核膜
A.僅DNAB.僅RNAC.DNA和RNAD.DNA或RNA