短文填空
It was late last Monday, but Tom was still ____ TV in his room. There was a wonderful football match on TV. ____ excited he was! That night he ____ go to bed until twelve o'clock. The next morning, it was a quarter to eight. It was ____ late for Tom to get to school ____ time. But he was still in bed. When Tom ____ school, it was eight. The teacher was already beginning her lesson. As soon as Tom came into the classroom, she got ____ and said,"What time is it now, Tom "Tom felt sorry and could say ____ . In English class, he ____ a test. As he didn't know the lessons at ____ , Tom failed his English test.
）一个，滑动变阻器一个，已调零的电流表、电压表各一块，开关一个，导线若干。请选用上述实验器材，设计一个实验证明：在R1与R2串联的电路中，如果R2的电阻值和通过它的电流保持不变，则电阻R1与R2的总电功率P与电阻R1的关系为P= kR1+ b（k和b均为不变量）。请画出实验电路图，写出实验步骤，画出实验数据记录表。