题目

阅读理解Peter: Have some water.Li Yan: Thank you, Peter.Peter: Do you like coffee?Li Yan: No, I don't. I like water and juice. What about you?Peter: I like water and coffee.【1】Who likes juice?________ ________ ________ juice.【2】Does Li Yan like coffee?________, ________ doesn't. 答案：【答案】【1】 Li Yan likes 【2】 No she 【解析】【1】略【2】略3．已知关于x的一元二次方程mx2+x+1=0．（1）当该方程有一个根为1时，确定m的值；（2）当该方程有两个不相等的实数根时，确定m的取值范围．