当工程内容明确、工期较短时,宜采用( )合同。
A.可调总价合同
B.固定总价合同
C.单价合同
D.成本加酬金合同
参考答案:B
一百万份重量的溶液中所含有溶质的重量分数表示的溶液浓度是
A.摩尔浓度B.重量比重量百分浓度C.百万分浓度D.比例浓度E.重量比体积百分浓度
Mrs ,Taylor has ___8-year-old daughter who has _____gift for painting –she has won two national prizes.
A.a,a
B.an,the
C.an,a
D.the,a