Many teenagers feel that the most important people in their lives are their friends．They believe that their family members don’t know them as well as their friends do．In large families，it is quite often for brothers and sisters to fight with each other and then they can only go to their friends for some ideas．
   It is very important for teenagers to have one good friend or a group of 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，because friends can discuss something．These things are difficult to tell their family members．
   However，parents often try to choose their children’s friends for them．Some parents may even stop their children from meeting their good friends．Have you ever thought of the following questions?
    Who chooses your friends?
   Do you choose your friends or your friends choose you?
   Have you got a good friend your parents don’t like?
   Your answers are welcome．

阅读材料，回答问题：

材料一：小白鼠活动的区域一般只限于隐蔽处，它们一旦进入空旷的地方就会设法寻找隐身处，表现出特殊的“寻墙行为”．将小白鼠放入迷宫中，小白鼠经过多次“走错路”，终于找到出口．用大量小白鼠进行实验，发现有的小白鼠可以很快找到出口，而有的小白鼠却要经过较多次失败后才能找到出口．

材料二：蜜蜂是营群体生活的昆虫，蜂群中有数万只工蜂，少量雄蜂和一只蜂王．工蜂的主要职责是清理蜂巢、喂养幼虫、筑巢、采蜜等；雄蜂专职与蜂王交配；蜂王的主要任务是产卵繁殖后代．