招标文件要求投标人提交投标保证金的，保证金数额一般不超过勘察设计费投标报价的( )。
A．1%
B．2%
C．3%
D．5%
参考答案：B
如果3个实体间两两都有联系，实体A与实体B之间是一对一联系，实体B和实体C之间是多对多联系，则实体A与实体C之间的联系是______。
A．一对一 B．一对多 C．多对多 D．无法确定
Helen has got it takes to be a great tennis player. In other words, she has the potential to become world famous.
A．how
B．what
C．when
D．that
