●During the last few years，it has been realized that maintenance of programs is more expensive than development,so reading of programs by humans is as important as (73) them.

●In recent years，TCP／IP has also begun to be used by telephone companies to provide faster,cheaper telephone (74) .

●C++is used with proper (75) design techniques.

●在Word中，如果要选择多处不连续的文本，可以 (2) 。

●面向对象程序设计以 (3) 为基本的逻辑构件，用 (4) 来描述具有共同特征的一组对象；以 (5) 为共享机制，共享类中的方法和数据。

●个人计算机(PC)是属于 (6) 类计算机。