题目

Anna from the United Kingdom: I think all kids in this world can play an important role（作用） in helping nature by not littering（扔垃圾） and by walking or cycling instead of driving.Kolya from Belarus: I think children should feed the animals and birds and plant trees. We mustn’t pollute（污染） the water.Catherine from the United States: If there aren’t enough dustbins in the world then I would be happy to make some, not for the money, but for the environment! I can start a “clean up around the community” event and hope other people, not just me. I can come to realize对称轴平行于y轴的抛物线经过直线y=＋3与两坐标轴的交点，且过(1，1)．求此函数的解析式.