听第一篇短文,回答下面3小题。请根据短文内容,选择正确答案,完成信息记录表。
Mr Lin's Trip
How often
He takes a trip (1) .
Why
He enjoys travelling a lot because (2) .
How long
Mr. Malin plans to travel (3) more years if possible.
抛物线y=-2x2-4x-5经过平移得到y=-2x2,平移方法是( )