如图，在□ABCD中，AC平分∠DAB，AB = 2，则□ABCD的周长为(           )

    July is coming. People all around the world are talking about their____(vacation). Parents would like____(help) their children relax.____ (luck), they have two months off. Some people enjoy quiet life, so many of ____(they) stay at home watching TV, using computers and so on.____some spend time differently. My pen pal Tony ____ blonde hair is a boy from the US. He says that ____(America) like going to the countryside. Just like his big family, they often go to a farm. There, some can feed animals, some can play and ____(other) can watch____ nice sky and rivers. They can also taste delicious food. They are quite _____(interest) in the life there.

下列某市2016年为群众拟办的重要实事中，属于政府履行加强社会建设职能的是（    ）

①对15条小区出行路、断头路等道路开展路灯改造工作

②为义务教育阶段中小学提供21个学科数字化名师授课资源

③加大就业工作力度，本市生源高校毕业生就业率不低于95%

④实现大型乳制品生产企业、畜禽产品生产企业的产品可追溯