One of the presents for you. You can take it away. [ ]
A. is
B. are
C. be
D. am
答案:A
建筑物的()是规定不同用途建筑物需采取哪些建筑防火措施的基本依据。
A、耐火等级
B、防火间距
C、防火分区
D、防烟分区
奎宁碱( )