概算定额一般是在( )的基础上综合扩大而成的。
A.施工定额
B.预算定额
C.概算指标
D.投资估算指标
参考答案:B
—I suppose all the students went to the museum this afternoon.
—I’m afraid not. They went to the net bar instead.
A.almost
B.nearly
C.mostly
D.most
管道内的照明电信系统一般采用()。
A、高压电
B、低压电
C、干电池
D、汽车电瓶