第1745题：四叶草
能生成上面类似四叶草图形的函数是( )
A.x2+y2=∣∣y∣+∣x∣∣ x^2 + y^2 = |\sqrt{|y|}+ \sqrt{|x|}|x2+y2=∣√∣y∣+√∣x∣∣
B. x2−y2=∣∣y∣+∣x∣∣x^2 - y^2 = |\sqrt{|y|}+ \sqrt{|x|}|x2−y2=∣√∣y∣+√∣x∣∣
C. x2+y2=∣∣y∣−∣x∣∣x^2 + y^2 = |\sqrt{|y|}- \sqrt{|x|}|x2+y2=∣√∣y∣−√∣x∣∣
D. x2−y2=∣∣y∣−∣x∣∣x^2 - y^2 = |\sqrt{|y|}- \sqrt{|x|}|x2−y2=∣√∣y∣−√∣x∣∣
