题目2阶行列式 | 1 & 1 1 & 1 | = 1。A. 对B. 错2阶行列式 $\left|\begin{array}{ll} 1 & 1 \\ 1 & 1 \end{array}\right| = 1$。A. 对B. 错题目解答答案B. 错