本课配套习题挑战模式1/5
单选题
难度系数:
1.刘英家的圆形镜子被打碎了,她拿了如图(网格中的每个小正方形边长为1)的一块碎片到玻璃店,配制成形状、大小与原来一致的镜面,则这个镜面的半径是( )
A: 2 |
B: |
C: |
D: 3 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWcqOe9keagvOS4reaJvueCuUHjgIFC44CBRO+8iOWmguWbvu+8ie+8jOS9nEFC77yMQkTnmoTkuK3lnoLnur/vvIzkuqTngrlP5bCx5piv5ZyG5b+D77yM5pWFT0HljbPkuLrmraTlnIbnmoTljYrlvoTvvIzmoLnmja7li77ogqHlrprnkIbmsYLlh7pPQeeahOmVv+WNs+WPry4=
- 答案:Qg==
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
本课配套习题挑战模式2/5
单选题
难度系数:
2.如图,某公园的一座石拱桥是圆弧形(劣弧),其跨度为24米,拱的半径为13米,则拱高为( )
A: 5 |
B: 8 |
C: 7 |
D: 5 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWFiOaehOW7uuebtOinkuS4ieinkuW9ou+8jOWGjeWIqeeUqOWLvuiCoeWumueQhuWSjOWeguW+hOWumueQhuiuoeeuly4=
- 答案:Qg==
6Kej77ya5Zug5Li66Leo5bqmQUI9MjRt77yM5oux5omA5Zyo5ZyG5Y2K5b6E5Li6MTNt77yMPGJyPuaJgOS7peaJvuWHuuWchuW/g0/lubbov57mjqVPQe+8jOW7tumVv0NE5YiwT++8jOaehOaIkOebtOinkuS4ieinkuW9ou+8jDxicj48aW1nIHdpZHRoPTEzNiBoZWlnaHQ9OTIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82NC85Qi9yQkFDRkZPV3ViZndPVUlZQUFBTGZrYnU2eFE2NDMucG5nIj48YnI+5Yip55So5Yu+6IKh5a6a55CG5ZKM5Z6C5b6E5a6a55CG5rGC5Ye6RE89Ne+8jDxicj7ov5vogIzlvpfmi7Hpq5hDRD1DTy1ETz0xMy01PTguIDxicj7mlYXpgIlCLiA=
本课配套习题挑战模式3/5
单选题
难度系数:
3.为了测量一铁球的直径,将该铁球放入工件槽内,测得有关数据如图所示(单位:cm),则该铁球的直径为( )
A: 12cm |
B: 8cm |
C: 6cm |
D: 10cm |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWchuW/g+S4uk/vvIzkvZxPReKKpUFC5LqORu+8jOi/nuaOpTBB77yMT0bvvIznlKjli77ogqHlrprnkIbmsYLlh7pPQeeahOmVv++8jOi/m+iAjOW+l+WHuuWFtuebtOW+hOeahOmVvy4=
- 答案:RA==
6Kej77ya5L2cT0XiiqVBQuS6jkbvvIzov57mjqVPQe+8jE9G77yM5YiZT0E8c3VwPjI8L3N1cD49T0Y8c3VwPjI8L3N1cD4rQUY8c3VwPjI8L3N1cD7vvIw8YnI+PGltZyB3aWR0aD0xMTEgaGVpZ2h0PTEwNiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0EwL0I3L3JCQUNFMU9XdWJ1aHlrdXdBQUFsQUJ3d2FjTTM2Mi5wbmciPjxicj7iiLRPQTxzdXA+Mjwvc3VwPj3vvIhPQS0y77yJPHN1cD4yPC9zdXA+KzQ8c3VwPjI8L3N1cD7vvIw8YnI+6Kej5LmL5b6XT0E9Ne+8jDxicj7iiLTnm7TlvoQ9NcOXMj0xMGNtLiA8YnI+5pWF6YCJRC4g
本课配套习题挑战模式4/5
单选题
难度系数:
4.如图表示一圆柱形输水管的横截面,阴影部分为有水部分,如果输水管的半径为5cm,水面宽AB为8cm,则水的最大深度CD为( )
A: 4cm |
B: 3cm |
C: 2cm |
D: 1cm |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNrumimOaEj+WPr+W+l+WHukFPPTVjbe+8jEFDPTRjbe+8jOi/m+iAjOW+l+WHukNP55qE6ZW/77yM5Y2z5Y+v5b6X5Ye6562U5qGILg==
- 答案:Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.如图,一宽为2cm的刻度尺在圆上移动,当刻度尺的一边与圆相切时,另一边与圆两个交点处的读数恰好为“2”和“8”(单位:cm)则该圆的半径为( )
A: cm |
B: 3cm |
C: 4cm |
D: 5cm |
一次做对,真牛!
+5奖励规则>
- 提示1:IOiuvk9CPXJjbe+8jOeUseS6juWIu+W6puWwuueahOWuveS4ujJjbe+8jOaJgOS7pU9DPXItMu+8jOWGjeagueaNruWPpuS4gOi+ueS4juWchuS4pOS4quS6pOeCueWkhOeahOivu+aVsOaBsOWlveS4uuKAnDLigJ3lkozigJw44oCd5Y+v5rGC5Ye6QkPnmoTplb/vvIzlnKhSdOKWs09CQ+S4reWIqeeUqOWLvuiCoeWumueQhuWNs+WPr+W+l+WHunLnmoTlgLwu
- 答案:QQ==