The algebra teacher in middle school often judged students by their academic performance.
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The author felt comfortable while sitting in the engineering library.
A. 对
B. 错
行列式是算式求得一个数(外形是竖线) 矩阵是数表(外形是方括号)。
A. 对
B. 错
行列式的行数列数一定相等,而矩阵的行数列数可以不相等。
A. 对
B. 错
矩阵的加减法的前提是同型矩阵。
A. 对
B. 错