问题
问答题 计算题
一台电源变压器初级线圈是4400匝，电压是220伏，若想在次级得到36伏电压，则需在次级绕线圈多少匝？
答案
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一台电源变压器初级线圈是4400匝，电压是220伏，若想在次级得到36伏电压，则需在次级绕线圈多少匝？
参考答案：
Dear Susan, You are only three years old, and at this point in your life you are not able to understand this letter. But some day when you grow up, I hope you will find something in what I am going to share with you. Life can be . There will be people in your life who won’t be very nice. They’ll laugh at you because you are different, for no good reason. You will also face heartbreak (心碎) and might be by those you love. I hope you don’t have to face these too much, but such things happen. Be open to life anyway. You’ll find cruelty in your through life, but don’t let that stop you from finding new things. Don’t retreat (退却) from life, and don’t yourself. Be open to new things, new experiences and new people. You will fail many times, but if you allow that to stop you from trying, you will miss many chances. Do remember that failure (失败) is a stepping stone to success. You will meet many people who will try to do better than you, in school, in college and at work. They’ll try to have nicer cars, bigger houses, nicer clothes, and so on. To , life is a competition. However, I believe life is a journey. If you always try your best to others, you are wasting your life. Learn to enjoy your life danger and you will make it a journey of , of learning and of love. Finally, know that I love you and always will. You are a really wonderful journey, and I will always be there for you. Love Dad
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