B

　　According to a new US study，couples who expect their children to look after them in old age should hope they have daughters because daughters are twice as attentive as sons overall.

　　The research by Angelina Grigoryeva，from Princeton University，found that，while women provide as much care for their elderly parents as they can manage，men do as little as they can get away with and often leave it to female family members.

　　Her analysis of the family networks of 26,000 old Americans concluded that gender(性别) is one of the most important things that decide whether or not people will actively care for their elderly parents.

　　ziyuanku.com In a paper presented at the annual conference of the American Sociological Association in San Francisco，she concludes that simply having a sister makes men likely provide less care.

　　ziyuanku.com Using data from the University of Michigan Health and Retirement Study，a study which has been tracking a cross­section of over­50s for the last decade，she calculated that women provide an average of 12.3 hours a month of care for elderly parents while men offer only 5.6 hours.

　　“Sons reduce their relative care­giving efforts when they have a sister，while daughters increase theirs when they have a brother.”

　　“This suggests that sons pass on parent care­giving responsibilities to their sisters.”

【2016届高考英语二轮复习讲义练习：第2部分 题型专题突破 专题1 第5讲 跟踪训练（全国卷Ⅱ）】相关文章：

★ 2014届高考英语一轮复习必修2参考答案（外研版）

★ 2017届高考英语二轮复习课时训练：6（含解析）

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题05 环境保护话题指导（教师版）

★ 2017届高考英语二轮复习课时训练：19（含解析）

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题20 校园学习话题指导（学生版）

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习书面表达专题训练：训练6 议论文＋记叙文（含解析）

★ 2014届高考英语一轮复习课时作业(四十一)选修7Module 5《Ethnic Culture》（外研版）

★ 2017届高考英语二轮复习课时训练：2（含解析）

★ 2017届高考英语二轮复习书面表达限时测验：7（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：名校模拟（含解析）