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设 $A=\left(\begin{array}{ll}2 & 3 \\ 3 & 0 \\ 1 & 2\end{array}\right), B=\left(\begin{array}{ccc}2 & 1 & 3 \\ -3 & 0 & -1\end{array}\right)$, 则 $|A B|=$
A. 0     B. 4     C. 6     D. 8         
不再提醒