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如图,小丽要制作一个圆锥模型,要求圆锥的母线长为9cm,底面圆的直径为10cm,...
如图,小丽要制作一个圆锥模型,要求圆锥的母线长为9cm,底面圆的直径为10cm,那么小丽要制作的这个圆锥模型的侧面展开扇形的纸片的圆心角度数是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100917849238148/SYS201311031009178492381024_ST/images0.png)
A.150°
B.200°
C.180°
D.240°
考点分析:
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