“宏病毒是哪一种网络安全攻击方式?()
A.端口扫描
B.窃取报文
C.拒绝服务攻击
D.源路由攻击
参考答案:C
If the students don’t understand what their teacher is talking about, he/she hasn’t _________his/her meaning_____________.
A.got…on
B.got…across
C.got…along
D.got…away
小三角测量分为一级小三角测量,二级小三角测量和图根小三角测量。