单项选择题

循环链表的主要优点是(38)。

A．不再需要头指针了
B．已知某个结点的位置后，能很容易找到它的直接前驱结点
C．在进行删除操作后，能保证链表不断开
D．从表中任一结点出发都能遍历整个链表
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单项选择题
利用逐点插入法建立序列(50，72，43，85，75，20，35，45，65，30)对应的二叉排序树以后，查找元素30要进行(42)次元素间的比较。
A．4
B．5
C．6
D．7
问答题
从供选择的答案中选出应填入英语文句中()的正确的答案。 You should be (A) of developing your program, using something better than the method that uses the philosophy: write (B) down and then try to get it working. Surprisingly, this method is wide used to day with result that an average programmer on an average job (C) out only between five to ten lines of correct code per day. We hope your (D) will be greater. But to improve requires that you apply some discipline to the (E) of creating programs. A: ① available ② capable ③ useful ④ valuable B: ① anything ② nothing ③ something ④ thing C: ① does ② looks ③ turns ④ runs D: ① activity ② code ③ productivity ④ program E: ① process ② experience ③ habit ④ idea
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