ICMP协议属于TCP/IP网络中的______协议,ICMP报文封装在______协议数据单元中传送。
A.IP B.TCP C.UDP D.PPP
参考答案:A
Look over there-there's a very long, winding path ________ up to the house. [ ]
A. leading
B. leads
C. led
D. to lead
气血亏虚之眩晕,出现脾虚气陷时,宜选方()。
A.归脾汤
B.四君子汤
C.六君子汤
D.生脉饮
E.补中益气汤