在主体分部子分部中下面（）能单独组卷。
A、混凝土结构
B、劲钢（管）混凝土结构
C、砌体结构
D、钢结构
E、木结构
参考答案：D, E
Mary had to go to a meeting,so she left her children _________ at home. [ ]
A. playing
B. played
C. to play
D. having played
紧靠防火墙两侧的门、窗、洞口之间最近边缘的水平距离不应小于（）m。
A.1.00
B.2.00
C.3.00
D.4.00
