●通信子网不包括 (63) 。

●在下面的IP地址中属于C类地址的是 (64) 。

●甲乙丙合作完成了一个软件的开发。甲欲将软件交某公司发行，乙则以该公司对其不够友好为由表示反对，丙未置可否。下列选项中，有关该事件的表述，正确的是 (65) 。

●The prototyping method is a dynamic design processs，which requires people who use prototyping method to have the following capability of (66) ．

●Most frequently used algorithm for page replacement is (67) .

●Traversing a binary tree in preorder is equivalent to (68) ．