本课配套习题挑战模式1/5

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单选题
难度系数:

1.两个半径不等的圆相切,圆心距为6cm,且大圆半径是小圆半径的2倍,那么小圆的半径为(  )
A: 3cm
B: 4cm
C: 2或4cm
D:2或6cm
  • 提示1IOeUseWkp+WchuWNiuW+hOaYr+Wwj+WchuWNiuW+hOeahDLlgI3vvIzlj6/orr7lsI/lnIbljYrlvoTkuLpyY23vvIzliJnlpKflnIbljYrlvoTkuLoycmNt77yM5Y+I55Sx5Lik5Liq5Y2K5b6E5LiN562J55qE5ZyG55u45YiH77yM5ZyG5b+D6Led5Li6NmNt77yM54S25ZCO5YiG5Yir5LuO5Lik5ZyG5aSW5YiH5LiO5YaF5YiH5Y675YiG5p6Q5rGC6Kej5Y2z5Y+v5rGC5b6X562U5qGILg==