①是一个人立身处世的前提     ②促进社会和谐

③体现国家形象                         ④能给予他人积极的评价

已知函数$f\left(x\right)=\frac{x^2+x+1}{x^2+1}$，若$f\left(a\right)=\frac{2}{3}$，则f（﹣a）=（　　）

Sally and Li Ming are talking about making the delicious chicken.

L：The chicken tastes great.

S：____

L：Could you tell me how to cook it? I want

to have a try.

S：Of course. ____

L：____

S：Next， fill the chicken with many herbs， and put the chicken into the oven (烤炉).

L：And then?

S：____

L：That's a long time.

S：Yeah. Finally when the chicken is ready， put it on the table and then cut it into slices.

L：Thanks for your recipe.

S：____