题目内容

4.下列有关膜剂的特点叙述,正确的为

A. 自动化生产
B. 节省大量辅料
C. 具速效作用
D. 层复方膜剂具有缓释性

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下面哪一条是顺序存储结构的优点?

A. 插入运算方便
B. 可方便地用于各种逻辑结构的存储表示
C. 存储密度大
D. 删除运算方便

在循环双链表的p所指的结点之前插入s所指结点的操作是 ( )

A. p->prior = s;s->next = p;p->prior->next = s;s->prior = p->prior;
B. p->prior = s;p->prior->next = s;s->next = p;s->prior = p->prior;
C. s->next = p;s->prior = p->prior;p->prior = s;p->prior->next = s;
D. s->next = p;s->prior = p->prior;p->prior->next = s;p->prior = s;

带头结点的单链表head为空的判定条件是( )

A. head==NULL
B. head->next==NULL
C. head->prior==NULL
D. head->prior==0

在一个单链表中,已知q所指结点是p所指结点的前驱结点,若在q和p之间插入s结点,则执行( )

A. p->next=s->next; s->next=p;
B. s->next=p;q->next=s;
C. s->next=p;p->next=s->next;
D. q->next=s->next;s->next=p;

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