《高层民用建筑设计防火规范》规定,安装在吊顶内的排烟管道,应与可燃物保持最小为()的距离
A.100mm
B.150mm
C.200mm
D.300mm
参考答案:B
---Your uncle ate nothing this morning, _______?
---No, he didn’t. He got up so late that he hurried to work without breakfast.
A.did he
B.didn’t he
C.does he
D.doesn’t he
生产经营单位主要负责人在本单位发生重大生产安全事故时,( ),给予降职、撤职处分,并处15日以下拘留;构成犯罪的,依法追究刑事责任。
A.抢救不力
B.逃匿
C.抢救不及时
D.在事故调查期间擅离职守