在建设工程合同的订立过程中，( )行为是承诺。
A．投标递交投标书
B．双方签订合同
C．招标人发出中标通知书
D．招标人的招标公告
参考答案：C
挤铅机
I think American English is a little _______ British English.
A．different from
B．difference from
C．difference in
D．different with
