Sara hopes____ ____ a teacher one day.
①—You are Danny.
—Yes. I'm Danny.
②Look,I'm tall and fat. Who am I?
③Look at my eyes. My eyes are small and brown.
④My nose is big. My mouth is big,too.
____
方程2x2﹣4x=5的近似根是____.
函数y=1-x21+x2的值域是 ( )