警报信号三长声二短声表示
B
暂无解析
设3阶方阵A=(α1,α2,α3),其中αi(i=1,2,3)为A的列向量,若|B|=|(α1+2α2,α2,α3)|=6,则|A|=()
Ourteacher__________ustopractiseourspokenEnglishasoftenaspossible.
计算5阶行列式D
Willyou_________playingbasketball?
Ourcountryisnolongerwhatit_____.