题目

With historical sites and beautiful beaches, the Beijing-Tianjin-Hebei area has keptattracting tourists from far and wide. Tourists can experience winter sports, hot springs, the teaand wine culture, as well as history and sightseeing. As Beijing has been worldwide popular, let's have a look at some of others.Tianjin Eye is a sky wheel built on a bridge over the Haihe River. It is 120 meters tall and one of the landmarks of Tianjin. It is the only sky wheel built above a bridge in the world.Five Great Avenues（大道）lie in the south of downtown Tianjin. Along the sides of those avenues, th设函数，，则的值域是A．B．C．D．