根据《广西壮族自治区实施〈中华人民共和国招标投标法〉办法》的规定,()应当对提交投标文件的真实性负责。
A.投标人
B.审批人
C.招标人
D.项目负责人
参考答案:A
若ab≠0,则等式|a|+|b|=|a+b|成立的条件是______.
The Canadian friends have given us a lot of books, few of _____ a bit difficult for us.
A.them are
B.that is
C.which are
D.which is