A.3 B.4 C.5 D.6
A.预知性维修 B.定期维修 C.事后维修 D.改善维修
A.火灾报警程序 B.火灾疏散方案 C.扑灭火灾的应急措施 D.人员和财产的抢救措施
A.6 B.8 C.9 D.10
A.48.47% B.56.49% C.116.54% D.129.82%