工程清单的主要内容包括()。
A、国家有关规定计算出的工程量
B、工程量清单说明和工程量清单表
C、项目名称、计量单位和工程量
D、工程量和当时当地的市场价格
参考答案:B
If we had taken such effective measures much earlier, the river _____ so seriously now. [ ]
A. is not polluted
B. would not be polluted
C. had not been polluted
D. would not have been polluted
低中压无缝钢管的标准为()
A.GB/T8162-2008
B.GB/8163-2008
C.GB5310-2008
D.GB3087-2008