{"lablename3":"高二数学","title":"已知a＝(1,1,0)，b＝(－1,0,2)，且ka＋b与2a－b垂直...[高二][数学]","mkid":"","lablename2":"高二年级","pagetype":3,"infoid":"1343372","infotype":0,"lablename1":"高中"}