类的实例化过程是一种实例的合成过程,而不仅仅是根据单个类型进行的空间分配、初始化和绑定。指导编译程序进行这种合成的是 (47) 。重置的基本思想是通过 (48) 机制的支持,使得子类在继承父类界面定义的前提下,用适用于自己要求的实现去置换父类中的相应实现。 (47)处填()。
A. 类的层次结构
B. 实例的个数
C. 多态的种类
D. 每个实例初始状态
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递归算法的执行过程一般来说可先后分成 (57) 和 (58) 两个阶段。 (57)处填()。
A. 试探
B. 递推
C. 枚举
D. 分析
Most computer systems are (71) to two different groups of attacks:insider attacks and outsider attacks.A system that is known to be (72) to an outsider attack by preventing (73) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (74) users.Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment,but also helps to prevent future attacks.These attacks are usually (75) by tools referred to as Intrusion Detection Systems. (74)处填()。
A. power
B. rights
C. authorized
D. common
清热解毒,利水消肿
A. 青黛
B. 蚤休
C. 穿心莲
D. 白鲜皮
E. 半边莲