如果{an}为递增数列，则{an}的通项公式可以为( )．

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如果{a_n}为递增数列，则{a_n}的通项公式可以为( )．

A：a_n＝－2n＋3

B：a_n＝^{$n^{2} - 3 n + 1$}

C：a_n＝ $\frac{1}{2^{n}}$

D：a_n＝1＋ ${\log_{2}}^{n}$

上一题下一题 0.0难度选择题更新时间:2011-01-20 04:54:57

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D

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人们常常喜欢用一些英语名言来作为自己的座右铭，请根据以下信息，给下面5个人选择合适的座右铭来配对。

____ Ann works hard at English. She never wastes time.

____ Bill is always afraid of failing exam . He needs more confidence.

____ David has good study habits. He thinks the beginning is very important.

____ Linda is 70 years old, but she still likes learning something.

____ Tom wants to be a professional basketball player, but he can’t play it very well.

A. Practice makes perfect.
B. Every minute counts.
C. Failure is the mother of success.
D. A good beginning is half done.
E. It is never too old to learn.

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