提供网络传输的保密性手段是，使攻击者无法检测到在网络中传递信息的来源地址、 ______ 、长度及其他特征。
参考答案：目的地址
I tried to come closer to watch the bird, but as soon as it noticed me, ______ into the woods. [ ]
A. did it fly away
B. did away it fly
C. away it flew
D. away flew it
“万紫千红总是春”，自然界的绚丽色彩是艺术的重要源泉。借助色彩中互补色关系可使色彩组合变得更加醒目。下列诗句体现了绘画色彩中互补色关系的是( )。
A．春来江水绿如蓝
B．万绿丛中一点红
C．一行白鹭上青天
D．两个黄鹂鸣翠柳
