对已完成施工图设计的小型工程，进行施工招标时，可采用( )合同。
A．单价
B．总价
C．成本加酬金
D．计划价格
参考答案：B
The speech by the mayor of Shanghai before the final voting for EXPO 2010 is strongly impressed _____
my memory. [ ]
A. to
B. over
C. by
D. on
为了保证钢纤维在混凝土中的分散性和均匀性，采用先干拌后加水的搅拌方式时，干拌时间不宜少于（）
A.30s
B.1min
C.1.5min
D.15min
