线路再生中继器LR—4可以将（）信号进行再生
A.STM—1
B.STM—4
C.STM—16
参考答案：B
An analyst gathers the following information about three equipment sales that a company made at the end of the year:（）
A．$30000
B．$40000
C．$50000
怎样理解犯罪概念的意义？
