下面类Circle中的定义的域和方法分别是: public class Circle { double radius; //圆的半径 double getArea() //计算面积的方法 { double area=3.14*radius*radius; return area; } }
A.
area和getArea()
B.
radius和getArea()
C.
getArea和radius
D.
getArea和area
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举一反三
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