EDI系统通过（ ）修改财务、库存等 MIS系统的记录。
A．用户接口模块
B．内部接口模块
C．报文生成及处理模块
D．格式转换模块
参考答案：B
________ the last flight. You have to stay here for another night.
A．There comes
B．Here was
C．There goes
D．Here we had
比较空气预热器和省煤器的作用的异同。
