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问题 单项选择题

用二分查找法对具有n个结点的线性表查找一个结点，所需的平均比较次数为( )。

A．O(n2)
B．O(nlog2n)
C．O(n)
D．O(1og2n)

答案

参考答案：D

填空题

“食必常饱，然后求美”的观点是（）提出的。
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听力题

小题1:I wasn’t  s___________________  to hear that he failed his math test

小题2:Would you please tell me something about your studying e________.

小题3:The girl was n_________________ when she heard the news

小题4:The teacher was a____________ us when we showed our opinions.

小题5:Mary will go to a movie  t_______  if it doesn’t rain.

小题6:There is much ______________(危险) on the road. Please look out!

小题7:They__________________(不能)to pass the math exam.

小题8:It is       （可能的）that he will be here in time .

小题9:I have two       (票)for the football game .

小题10:It ____________(好像) that there had been many buildings here.
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