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×...
For ordinary Italians, Sunday's news probably amounts to a mixed blessing.对普通的意大利人民来说，星期天的新闻可以说是悲喜交加。to pray for God's blessing祈求上帝降福A TV can be a real blessing for old people.有电视看对于老年人来说是难得的好事....
It causes blindness or serious loss of vision.这能导致失明或视力严重受损。Early diagnosis and treatment can usually prevent blindness.早期的诊断和治疗通常可以预防失明。I have long since come to terms with my blindness.我早就安于自己的失明了....