A.3 B.4 C.6 D.8
A.18 B.24 C.36 D.48
A.經(jīng)血傳播 B.性傳播密切接觸傳播 C.圍產(chǎn)期母嬰傳播 D.醫(yī)院性傳播 E.昆蟲(chóng)傳播