设向量组(I)：<img src="http://www.weimei168.com/uploads/202208/161257926014851.png" width="20" height="29" />，<img src="http://www.weimei168.com/uploads/202208/161257919373521.png" width="24" height="29" />，…，<img src="http://www.weimei168.com/uploads/202208/161257920171221.png" width="22" height="30" />的秩为r，则必有（）