把每一组的频率逐组相加,找出包含中位数的那一组.Add the frequencies in each class to find the class that contains that centermost element.一半数值低于中位数,一半数值高于中位数.One half of its values will be found below and one half above the median.儿童发铅中位数为7.45×...
I cannot see things through your spectacles.我的看法和你的不一样.He peered at Winston over the top of his spectacles.他的眼光从镜架上面透过来看温斯顿.The aurora is one of nature's most awesome spectacles.极光是自然界最可畏的奇观之一....