题目

Many teenagers feel that the most important people in their lives are their friends．They believe that their family members, especially their parents, don’t know them as well their friends do．In large families, it is often for brothers and sisters to fight with each other and then they can only go to their friends for advice．It is very important for teenagers to have one good friend or many friends．Even when they are not with their friends, they usually spend a lot of time talking among themselves on the phone．This communication is very important in children’s growing up,28、读我国东北北部地区年平均气温分布图，回答下列问题。 （1）简述图中0℃等温线的分布特点及主要影响因素。 （2）与该大陆西部相比，该地0℃等温线的纬度位置偏低，主要原因是什么？ （3）图中－3℃等温线有一段明显弯曲，原因是什么？