已知定义在R上的函数f（x）=|x﹣m|+|x|，m∈N^*，存在实数x使f（x）＜2成立．

（Ⅰ）求实数m的值；

（Ⅱ）若α，β＞1，f（α）+f（β）=2，求证：$\frac{4}{\alpha }$+$\frac{1}{\beta }$≥$\frac{9}{2}$．

     Mabel was a naughty boy and he was not good at his study. “Could do better” were usually the 1 at the bottom of his report card. His parents 2 Mabel's marks a lot. How they wished Mabel made a little progress. But whenever they got his report card, they were quite disappointed, 3 their heads.

     At the end of the term, the report card would be sent home. Mabel wished to find a safe place away from the 4 faces of his parents. One morning, when Mabel was still in bed, his mother rushed into his room, holding the report card in hand. “Well done, son. You are number one in the class. You are our 5.” She gave Mabel a big kiss. Mabel could not believe it, 6 he looked at the report card carefully.

     Very soon, Mabel found out it was Manuel's report card, not his. The teacher had made a 7. His mother had left, busying calling all the family about the 8 news. Mabel wondered what the right thing to do was. He thought for a while, whether to please his parents 9 to be an honest boy. Finally, he decided to tell his parents the 10.

— ________ I finish my homework now?   

— No, you ________.

2016年9月4日，G20峰会在我国杭州召开，***主席发表讲话：强调要建设开放型世界经济，构建互利共赢的全球价值，并为世界经济发展开出了“中国药方”，得到了与会国家的高度评价。这表明（    ）

①改革开放以来我国建立起了坚实的经济基础   ②我国正式跨入经济强国行列

③我国的国际影响力日益提高                               ④我国坚持对外开放的基本国策