His sacrifices for the country were never officially________, which made all of us feel discouraged.[ ]

A. acknowledged  

B. appealed

C. recommended  

D. evaluated

GPRS终端能获得IP但无法与主站连接有哪些原因（）

A.移动通道故障

B.路由器故障或路由器未配置相应IP地址段的路由

C.通讯模块故障

D.终端通信参数（主站IP、端口号、APN节点）配置错误