日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

Only 103 of the 400 students taking part in a three-week-long campaign aimed at reducing mobile phone use in class at Sanxia College were able to stick it out for the full 21 days.

The campaign, which began on April 12, was designed to encourage good habits among freshmen and sophomores, but most dropped out less than a week later.