判断题 The procedure used in the partial-pivoting Gaussian elimination does not change the value of the determinant, and the sign of the determinant, which can be fixed with the knowledge of the order of pivoting elements.

判断题 慢说朗诵,即便日常说话,当进入特殊的情感时,声音也会自然带出一些特征,客观地强化语言的表达。

问答题 采伐解析木前，先标定（      ）向和（     ）位置，准确的绘制出树冠投影图。