GPRS点对点无连接网络业务属于数据报业务类型,是由提供两个用户之间网络层通信的无连接网络协议CLNP和IP协议支持的业务。()
参考答案:对
世界上面积最大的洲是( )。
A.亚洲
B.欧洲
C.北美洲
D.南极洲
--- It was said that little Bill hit his classmate on the head.
---He is thought to be a(an )________ boy, who is always ready to start a fight.
A.ashamed
B.awkward
C.desperate
D.aggressive