题目

 阅读理解 My favourite teacher is very clever, She is my best teacher. She teaches us many English words， So we can learn about the world. She tells me my mistakes (错误), No matter (不管) how many I make. She gives us homework to do every day, But that’s OK. After I finish, I can play. Sometimes I have no good ideas, But she always makes things clear. Now I will leave (将离开) here and go to middle school, But I love this hard-working teacher. She is so cool! (   )1. In this poem (诗), the writer talks about his .       A. teacher     B. sc已知函数f （x）=2x，f -1（x）是f （x）的反函数，求f -1（4-x2）的单调递减区间．