问题 选择题

已知两圆外切,圆心距为5cm ,若其中一个圆的半径是3cm ,则另一个圆的半径是[ ]

A.8cm    

B.5cm   

C.3cm    

D.2cm

答案

答案:D

开放性试题

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活动一:圣火传递

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活动二:风采展示

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活动三:建议采集

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单项选择题 A2型题