对于分式 $P=\frac{x}{y}$ ，我们把分式 $P\text{'}=\frac{-y+1}{x+1}$ 叫做 $P$ 的伴随分式. 若分式 $P_1=\frac{a-1}{a}$ ，分式 $P_2$ 是 $P_1$ 的伴随分式，分式 $P_3$ 是 $P_2$ 的伴随分式，分式 $P_4$ 是 $P_3$ 的伴随分式，以此类推…，则分式 $P_{2017}=$ ____.

    Hi! I'm Linda. I am ____ English girl. Now I'm in Shanghai with my parents. There is a ____ store next to my house. ____ name is Xingxing Clothes Store. You can buy all kinds of ____ in it. They have sweaters at a very good ____. Do you need bags? They ____ great bags for 26yuan each. They have hats ____ red, black and yellow. They ____ have nice skirts for girls. For ____, they have shorts and sports socks. Do you ____ to come here? Let's have a look this afternoon.

如果每行栽6棵树，二(2)班比二(1)班多栽多少棵树?