单选题：在一个单链表中，已知s结点，若在s后插入k结点，则须执行( ).

在一个单链表中，已知s结点，若在s后插入k结点，则须执行( ).
@[A](2)

A. k->next=s->next; s->next=k;
B. s->next=k; k->next=s;
C. s->next=k->next; k->next=s;
D. k->next=s; s->next=k->next



A.k->next=s->next; s->next=k;
B.s->next=k; k->next=s;
C.s->next=k->next; k->next=s;
D.k->next=s; s->next=k->next


答案：A