【简答题】测量A,B两地之间的距离,限于测量工具,将其分成1200段进行测量,假设每段的测量误差(单位:m)相互独立,并且都服从区间(-0.5,0.5)上的均匀分布,用【图片】表示标准正态分布分布随机变量的分布函数,那么测量的总误差的绝对值不超过20米的概率近似为( )A. B. C. D. E. F.
【简答题】根据汉语提示完成句子 1. He should be able to read the word (不用字典帮助). 2. They were accused (帮助他逃跑). 3. (在……的帮助下)our English teacher, all of us in our class have made great progress this term. 4. Through the spee...