(单选题)20: 下面属于被动攻击的手段是( )
A: 假冒
B: 拒绝服务
C: 修改信息
D: 流量分析
1.(单选题)—Hello,YangLinspeaking. —________________ A.I am Carol. B.This is Ca...
1.(单选题)—Hello,thisisJohnspeaking.CouldIspeaktoMike — A.Of course you can. B...
1.(单选题)—Wow,thisplaceisamazing. —________________ A.It belongs to my grandp...
1.(单选题)—Hi,I'mMelindaSmith,thenewsecretary.Nicetomeetyouhere. —Hi,I'mMikeBr...
1.(单选题)—Hello,I'mDavidChen.Nicetomeetyou. —. A.Are you B.Nice to meet you t...
要做作业扫码我