向量组 $\alpha_1=\left(\begin{array}{l}2 \\ 1 \\ 3\end{array}\right), \alpha_2=\left(\begin{array}{l}1 \\ 2 \\ 1\end{array}\right), \alpha_3=\left(\begin{array}{l}3 \\ 3 \\ 4\end{array}\right), \alpha_4=\left(\begin{array}{l}5 \\ 1 \\ 8\end{array}\right), \alpha_5=\left(\begin{array}{l}0 \\ 0 \\ 2\end{array}\right)$ 的一个极大线性无关组是 .
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