（1）求10﹣4（x﹣3）≥2（x﹣1）的非负整数解，并在数轴上表示出来．

（2）用配方法和公式法求下列方程：$x^2-5\sqrt{2}x+2=0$．

阅读短文,选择最佳答案。

   Last Sunday afternoon, I was having dinner in a restaurant when my friend Poor came in. Poor is working in a bank and is quite rich, but he is always borrowing money from his friends and never pays it back. Poor saw me and came to sit at my table. He had never borrowed any money from me. When he was eating, I asked him to lend me two dollars. To my surprise, he gave me the money at once.“I have never borrowed any money from you,”Poor said,“So you can pay for my dinner.”
Read the passage and choose the best answers.

金银条块、金属铸币、纸币、电子货币的出现各有其历史作用。下列对应正确的是（  ）

①纸币——代替货币执行流通手段职能

②金属铸币——促进商品流通

③金银条块——物物交换得以成功的前提

④电子货币——减少市场上的货币流通量