招标投标与询价采购、谈判采购以及拍卖竞价的主要区别是( )。
A．竞争性 B．规范性C．程序性 D．一次性
参考答案：D
Matter is anything____
A．that take up space and have weight
B．which take up space and have weight
C．that takes up space and has weight
D．those take up space and have weight
