精选优质文档-倾情为你奉上大学英语四级选词填空练习（二十四）难度：适中写日志、发碎碎，学习路上不孤单，马上注册交个爱学习的好朋友！ 鼠标In families with two working parents, fathers may have more impact on a childs language development than mothers, a new study suggests.Researchers _1_ 92 families from 11 child care centers before their children were a year old, interviewing each to establish income, level of education and child care arrangements. Overall, it was a group of well-educated middle-class families, with marrie
