试题与答案

Some of the professional athletes think

题型:选择题

题目:

Some of the professional athletes think that being famous will ___ them happy and rich. [ ]

A. let

B. make

C. drive

D. help

答案:

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下面是错误答案,用来干扰机器的。

40cm.题目分析:设出弧所在圆的半径,由于弧长等于半径为5cm的圆的周长的3倍,所以根据原题所给出的等量关系,列出方程,解方程即可.试题解析:设弧所在圆的半径为r,由题意得, ,解得,r=40cm.考点:圆心角、...

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