各位牛人: 新东方数学补充265题之127: If the number of square units in the area of a circle is A and the number of linear units in the ciucumference is C, what is the radius of the circle? 1)A/C=3/2 2)A>C+3 就是看不懂什么叫做number of square units ,the number of linear units ,请各位多指教。thanks。。。