题目

完形填空     One Sunday morning in winter, I went for a walk. It was a very cold day, and there was a strong    1  . By the side of a river I wanted to sit down to   2   when I saw a small white   3 . It lay down at my feet. I patted (抚摸) it   4   the head. When I started to walk home, it  5 me and I could not get rid of it. It had a collar (项圈) on,    6   there was no name on it , so when I arrived home, I rang up the nearest police   7   . I told the policeman that I had found a small white dog, and I would   8  it until its  9   claimed 实验桌上有如下器材：稳压电源（6V）一个、电流表（量程0-0.6A）和电压表（量程0-15V）各一只、开关、滑动变阻器（铭牌“50?1A”）、阻值为5?、6?、8?、12?、15?、20?的定值电阻（不考虑温度对电阻的影响）各一个和导线若干．请你设计一个实验证明：“当电压保持不变时，电阻消耗的电功率与该电阻阻值成反比”．要求：（1）画出实验电路图：（2）简明陈述实验步骤：（3）请根据你的实验步骤画出实验数据记录表：