甲建筑单位对其一项建筑工程进行招标，项目建设期18个月，工程总造价3000万元，并发出了招标文件，文件中明确了投标人需提交投标保证金。A、B、C、D四家具有相应资质的施工企业前来投标，并在规定的时间内提交了投标文件，其中C企业未提交投标保证金，而被招标人拒绝。
投标保证金一般最高不得超过( )万元人民币。
A．60
B．70
C．80
D．100
参考答案：C
Mrs. Brown is from London in England, but she likes in China. She says her students all work very and they are very friendly. She loves very much. Mrs. Brown a son and a daughter. Her son’s name is Jack. He is ten. Her daughter’s name is Sue. She is seven old. They study in China. They don’t have classes weekends. They their school very much. After school, they often shopping or play sports. They help their mother some housework sometimes. They have a happy .
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