安检验讫章实行()、集中管理,落实到各班(组)使用。
A.独立编号
B.一人一章
C.统一编号
D.单独编号
参考答案:D
Could you please tell me ______ just now?[ ]
A. what's happened
B. what's happening
C. what happened
D. what was happened
在扑救高层建筑火灾时,战斗人员和器材集结处应位于着火层下一层或()。