在一个单向链表中p所指结点之后插入一个s所指向的结点时，应执行s->next=p->next；和（）的操作

A.s-＞next = p; p-＞next=s;

B.s-＞next = p-＞next; p-＞next=s;

C.s-＞next = p-＞next; p=s;

D.p-＞next = s; s-＞next = p;

B．s-＞next=p-＞next;

C．B．s-＞next=p-＞next;

D．p-＞next=s;

E．C．p-＞next=s;

F．p-＞next=s-＞next;

G．D．p-＞next=s-＞next;

H．p-＞next=s;

A.p-＞next=f

B.p-＞next=f和f=p

C.f=p-＞next

D.f-＞next=p和f=p

A.p=NULL;

B.p=head;

C.head=p;

D.p->next=head;

A.p->next=p->next->next;

B.p=p->next;

C.p=p->next->next;

D.p->next=p;

A.O(1)

B.O(n)2

C.O(nlogn)

D.O(n)

A.Ⅰ

B.Ⅱ、Ⅲ

C.Ⅰ、Ⅱ

D.Ⅰ、Ⅱ、Ⅲ