向一个栈顶指针为HS的链栈中插入一个s所指结点时，则执行（）。(不带空的头结点)A:s—＞next= HS; HS= HS—＞next; B:HS—＞next=s; C:s—＞next= HS—＞next; HS—＞next=s; D:s—＞next= HS; HS=s; 答案: s—＞next= HS; HS=s;

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向一个栈顶指针为HS的链栈中插入一个s所指结点时，则执行（ ）。(不带空的头结点)A:s—＞next= HS; HS= HS—＞next; B:HS—＞next=s; C:s—＞next= HS—＞next; HS—＞next=s; D:s—＞next= HS; HS=s; 答案: s—＞next= HS; HS=s;