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）=（　　）

2015年12月4日，中国人民银行再次宣布降息降准。一年内央行四次降准、五次降息，从中我们可以得出的市场信息有（  ）

地图的种类很多，有目的选择地图，才能及时准确地获取有用的信息，下面对地图的选择合适的是（　　）

Should teenagers be asked to move out when they start working? People in different countries have different ____.

In many Western countries, teenagers are allowed to move out at the age of____. Their parents believe that they should be____ to care for themselves from an early age. In this way, when they start working, they can  ____

their own lives. In most Asian societies,____,it is not common for teenagers to move out. Chinese parents believe that ____  is better for children to live with parents who can take care of them. But the young should then look after their parents when they get____. That is why many Chinese adults continue to live with their parents, even ____ they get married.