题目下列各组数据是勾股数的有( )①555,121212,131313;②0.30.30.3,0.40.40.4,0.50.50.5;③444,777,555;④111,222,3\sqrt{3}3.A.111组B.222组C.333组D.444组知识点:勾股数章节:图形的性质 / 三角形