题目

I made a pledge (誓言) to myself on the way down to the vacation beach cottage. For two weeks I would try to be a loving husband and father. Totally loving. No ifs, ands or buts. The idea had come to me as I listened to a talk on my car radio. The speaker was quoting a Biblical（圣经的）passage about husbands being thoughtful of their wives. Then he went on to say, “Love is an act of will. A person can choose to love.” To myself, I had to admit that I had been a selfish husband. Well, for two weeks that would change. And it did. Right from the moment I kissed Evelyn at the door and 如图所示电路，R2的阻值为30Ω，滑动变阻器R1最大阻值为60Ω，电源电压为18V，当滑片在不同位置滑动时，求：（1）电流表示数范围（2）电压表示数范围．