商品削价要本着即能使企业（），又能是商品扩销的原则
A.获得利润
B.减少损失
C.取信于民
D.诚信兴商
参考答案：B
The new suspension bridge ____ by the end of thismonth. [ ]
A. has been completed
B. has completed
C. is completed
D. will be completed
CSU/DSU在概念上通常作为（）设备来使用。
A.路由器
B.DTE
C.交换机
D.DCE
