A.head—>next= =NUL
B.head= =NULL
C.head—>next= =head
D.head!=NULL
第1题
A.head->next==NULL
B.head==NULL
C.head->next==head
D.head!=NULL
第2题
A.head = = NULL;
B.head->next = = NULL;
C.head->next = = head;
D.head! = NULL;
第5题
A.head = = NULL;
B.head->next = = NULL;
C.head->next = = head;
D.head! = NULL;
第6题
A.head==NULL
B.head→next==NULL
C.head→next==head
D.head!=NULL
第7题
A.head==NULL
B.head->next==NULL
C.head->next==head
D.head!=NULL
第8题
A.head == NULL
B.head == NULL
C.head -> prior == head
D.head -> next == head
第9题
A.HEAD= =NULL
B.HEAD-〉NEXT= =NULL
C.HEAD-〉NEXT= =HEAD
D.HEAD!=NULL
第10题
A.this.head.next==null;
B.this.head==null;
C.this.head.next==this.head;
D.this.head!=null;
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