招开投标人会议属于以下哪个过程()
A.询价
B.采购规划
C.合同管理
D.发包规划
参考答案:A
_______ is estimated that 25 million school lunches are sold each day.[ ]
A. It
B. That
C. This
D. As
蛋白质在有氧环境下被微生物分解的过程,称为()。