单项选择题
A.O1:40,H1:40,A1:40,B1:40 B.O1:80,H1:160,A1:40,B1:40 C.O1:160,H1:160,A1:320,B1:40 D.O1:160,H1:40,A1:40,B1:320 E.O1:40,H1:320,A1:320,B1:320
A.潜伏期 B.初期 C.极期 D.缓解期 E.恢复期