题目

Abby Subark is a mother of two from Boston．“For my kids, I’m nervous．I don’t know if they’ll be able to achieve their American dream.” She may be right．More than hard work or education, the best way to get rich in America is to be born rich. It is the case that somebody who is in the upper third of income, poor scores, in the bottom on tests when they are in eighth grade, is more likely to go to college and finish college than a poor kid with the top scores．That’s what the working persons’ children are up against. The Economic Policy Institute finds it would take a poor c2．下面的每个图形中各有几组平行的线段．