单项选择题
A.人防、技防、器防B.剂防、技防、器防C.人防、剂防、器防D.人防、技防、事防E.事防、器防、技防
A.1天B.3天C.7天D.14天
A.5%-12%B.3%-15%C.2%-10%D.>12%E.5%-18%