某实验小组的小刘和小李两位同学先后利用如图所示电路测量一定值电阻R_x（不考虑温度对电阻的影响），图中连接电压表的线未画出．实验时，闭合开关，移动滑动变阻器的滑片，得到电流表和电压表的示数分别如表一和表二所示．经检查与核对，他们的实验操作与数据记录都准确无误．根据表中数据解答下列问题：

（1）比较表一和表二可知，当电流表示数增大时，在小刘的实验中，电压表的示数是增大的，而在小李的实验中电压表的示数却是减小的，请你简要分析产生这种现象的原因．

（2）请在图中将小李的实验电路连接完整．

（3）试求定值电阻R_x以及电源电压U．

                           My Stay in New York

    After graduation from university, I had been unable to secure a permanent job in my small town. So I decided to leave home for New York,____I might have a better chance to find a good job. ____ (earn) some money to pay the daily expenses, I started work in a local café as a waiter. I believe that30．____ I was offered a good position, I would resign at once.

    Over time, the high cost of living became a little burden on my already  ____ (exhaust) shoulder. On the other hand, my search for a respectable job had not met with much success. As I had studied literature at university, I found it quite difficult to secure a suitable job in big companies. Mother had just said that ____ I want to have a better career advancement, I had to find work in the city. Perhaps ____my mother had told me was deeply rooted in my mind. I just did as she had expected.

    Soon I had lived in the city for over six months but I still did not like it. Apparently, I had difficulty____ (adapt) myself to life in the city, let alone finding a job to my delight. After nine months of frustration, I eventually decided to go back to my small town. Not until I returned ____I realize that a quiet town life was the best for me.