任何起居处所和服务处所允许使用的可燃贴面的厚度不应超过：（）
A.2mm
B.2.5mm
C.3mm
D.4mm
参考答案：B
I was born _______ the morning _______ February 25th, 1997. [ ]
A. in; of
B. on; in
C. in; in
D. on; of
二级（含）以上战备命令的发布有何规定？
