{"lablename3":"五年级数学","title":"一个三角形的底边长扩大2倍，高不变，扩大后的三角形面积比原来三角形面积扩大倍...[五年级][数学]","mkid":"","lablename2":"五年级","pagetype":3,"infoid":"2366290","infotype":0,"lablename1":"小学"}