防烟分区在建筑内部采用()等具有挡烟功能的构配件进行分隔所形成的,具有一定蓄烟能力的空间。
A、吊顶
B、高度超过500mm梁
C、挡烟垂壁
D、防火卷帘
参考答案:B, C, D
Maggie wanted an evening job that would allow her to ______ her son during the day.[ ]
A. look at
B. look around
C. look after
D. look out
急性肾盂肾炎正规用抗生素()。
A.高血压
B.缓解尿路刺激征
C.治疗成功的关键
D.预防尿路感染的关键
E.治愈后1年内避孕