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(2011•泰宁县质检)如图是一个高为cm,底面半径为2cm的圆锥形无底纸帽,现...
(2011•泰宁县质检)如图是一个高为
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230742899068403/SYS201310212307428990684008_ST/0.png)
cm,底面半径为2cm的圆锥形无底纸帽,现利用这个纸帽的侧面纸张裁剪出一个圆形纸片(不考虑纸帽接缝),这个圆形纸片的半径最长可以是( )
(计算结果保留3个有效数字.参考数据
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230742899068403/SYS201310212307428990684008_ST/1.png)
4,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230742899068403/SYS201310212307428990684008_ST/2.png)
2)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230742899068403/SYS201310212307428990684008_ST/images3.png)
A.3.12cm
B.3.28cm
C.3.31cm
D.3.00cm
考点分析:
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