如图所示电路中，电源电压是6V且保持不变，两盏灯两端的电压都是2.5V。
求：（1）滑动变阻器两端的电压？
（2）小灯泡L₁、L₂灯丝电阻之比R₁∶R₂是多少？

    Everyone wants to be successful. But failure is a common(普通的) thing for us to meet with.1, sometimes we fail the exams, sometimes in the sports meet, others 2but we fail. So 3everybody meets with the failure in his life.

    However, different people have different 4to deal with the failure. Some people lose

    hope when they fail. They seem to think that it is the5of the world. Others don't take failure 6. They seem to think that failure is the first step(步骤) to success. They will keep up and try their best  7the final success.

    Now let's imagine (猜想) the ends of the two ways. If we are afraid of the failure and always feel 8, and don't try our best to change ourselves, we may meet with more and more failures. But if we are hopeful and brave to face them, and never give up, we will 9 successful and our dreams will come true some day.

    So, please remember: Life doesn't give us the pleasure we want. But if we never give up and10do little by little, it will make a big difference.