由一个热源向几个厂区或城镇集中供应热能的系统称为()。
A、局部供暖系统
B、集中供暖系统
C、区域供暖系统
D、分散供暖系统
参考答案:C
25.It is reported that a great many villagers were killed in the explosion, and only a few _____it.
A.remained
B.lived
C.rescued
D.Survived
直接工程费不包括()。
A.企业管理费
B.人工费
C.材料费
D.施工机械使用费