题目

Why College is Not Home The college years are supposed to be a time for important growth in autonomy (自主性) and the development of adult identity . However , now they are becoming an ___41____period of adolescence , during which many of today’s students are not shouldered with adult _____42____. In the past two decades , continued connections with and ___43____on family , thanks to cell phones , email and social media , have increased significantly . Some parents go so far as to help with coursework . Instead of promoting the idea of college as a passage from the shelter of the f设A，B为直线y=x与圆x2+y2=1的两个交点，则|AB|=（ ）A．1B．C．D．2