EDI的目的是______。
参考答案：(充分利用现有计算机及通信网络资源，提高贸易伙伴间通信的效益，降低成本)
As we all know, many Chinese words have come into English, _____ typhoon, tofu and kung fu.
A．for example
B．that is
C．such as
D．so as to
集电弓按结构形式可分为（）三种
A、单臂、双臂、四臂
B、单臂、双臂、菱形
C、单臂、菱形、四臂、
D、菱形、双臂、四臂
