单项选择题
A.粪-口途径 B.献血 C.性接触 D.接触污染的医疗器械 E.母婴垂直传播
A.8000/1000,000 B.10,000/1,000,000 C.8000/990,000 D.10,000/990,000 E.9,800/990,000
A.60/1000,000 B.140/2000 C.200/8000 D.140/10,000 E.200/10,000