交易成本
参考答案:
是交易各方在达成协议和遵守协议过程中所发生的成本,包括信息搜索成本、协商与决策成本、契约成本、监督成本、执行成本等。
发动机引气5级和9级的选择是倚靠什么来完成的()
A.倚靠BMC来完成
B.倚靠人工选择完成
C.倚靠HP9级实际提供的供气压力大小决定的
D.倚靠EEC来完成
句型转换。
1. Bruce has art lessons twice a week.(对画线部分提问)
______ ____ ______ ____ does Bruce have art lessons?
2.She hardly knew how to solve this math problem.(完成反意疑问句)
She hardly knew how to solve this math problem, ______ ____ ______ ____?
3.It is interesting to send English messages to friends on a mobile phone.(改为感叹句)
______ ____ ______ ____ interesting thing it is to send English messages to friends on a mobile phone!