阅读下面的短文，然后以约30个词概括短文的要点。
Learning to study is not difficult. The first thing to remember is that you must be willing to learn. It doesn't mean that you must always like the subject. It does mean, however, that you must be willing to learn whatever is necessary. Try to understand why it is important and how it will help you now and later. Knowing mathematical facts will be useful in your whole life. Knowing how to spell words makes any kind of writing easier. Sometimes the subject that you think is going to be uninteresting and it will be attractive when you began to work on it. Learning things can be fun if you can try your best.
Here’s some advice for you: have a certain time each day and a quiet place with good lighting for study, so that you can concentrate on your study without interruptions. Have everything ready before you sit down to study, a dictionary, paper, a pen and books. Be sure you understand what you should learn before you start. Read carefully and pay special attention to the most important things. When memorizing, find out the main parts and then recite the whole thing. Check your homework after you finish it. Never forget the importance of review and preview.
【写作要求】
1.可以参阅阅读材料的内容，但不得直接引用原文中的句子；
2.作文中不能出现真实姓名和学校名称；
3.只要求用30个词左右概括短文要点。
【评分标准】
概括准确，语言规范，内容合适，连贯。
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值，
，在小球运动过程中经过比O点高H的P点，小球离开P点至又回到P点所用的时间为
，测得
，可求得
