运用有效数字的运算规则进行计算时,作图法和最小二乘法在保留有效数字问题上会出现较大的差异.对此进行分析后,得出有效数字的保......

图表法简单,直观,易于理解,《概率论与数理统计》中涉及的公式及题目有些往往比较抽象,学生难以理解。引入图表法可以让学生对这些......

In daily life, the author finds that even though reporting the same event, different newspapers employ different words,s......