题目

Accidents happen almost daily. Some accidents are minor and some are serious but others may be fatal. We read about such accidents nearly every day in the newspapers. It is wrong for people to think that accidents occur only on the roads or highways, or even at worksites. Home accidents are just as common. Because very few home accidents are reported, people tend to think that there are few accidents which happen in homes. There have been many cases where people fall to their deaths from high-rise flats. Children often fall from staircases while coming down the stairs. Old people may slip on w长江三角洲区域是我国经济比较发达的地区，其区域两翼的中心城市是( )A. 杭州 B. 上海 C. 苏州 D. 南京