代码可重用性一直是软件开发所追求的,在面向对象程序设计中,()机制为编程人员提供了重复利用程序资源的一种途径。
A.封装机制
B.抽象机制
C.多态机制
D.继承机制
参考答案:A
能源植物
So sudden that the enemy had no time to escape. [ ]
A. did the attack
B. was the attack
C. the attack did
D. the attack was