题目

Students who date (约会）in middle school have significantly worse study skills, are four times more likely to drop out of school and report twice as much alcohol and tobacco use than their single classmates, according to new research from the University of Georgia. Romantic relationships are a trademark of adolescence ，but very few studies have examined how adolescents differ in the development of these relationships, said Pamela Orpinas ，study author and professor in the College of Public Health and head of the Department of Health Promotion and Behavior. Orpinas followed a gr某同学在百度搜索某词条时找到这样的话：凡本国人及外国人之企业，或有独占的性质，或规模过大为私人之力所不能办者，如银行、铁路、航路之属，由国家经营管理之，以使私有资本制度不能操纵国民生计。由此判断他搜索的词条应该是是A．洋务运动之民用工业B．维新思想之经济方针C．三民主义之民生主义D．新三民主义之民生主义