Xuc ore pool
In addition to maintaining your glasses, you should be diligent. When you find problems, asking experts to help you immediately is the smartest way to solve them
you should be careful when collecting glasses.
you should also form a fixed habit in the way of placing glasses. First wrap the lens with flannelette, then close the left frame, and then close the right frame. In order to prevent the glasses from being stressed, you can put the glasses in a hard glasses collection box
The professional optometrist should adjust the glasses to the most comfortable position according to the principle of "matching point, line and surface". However, after wearing glasses for a period of time or being impacted or squeezed, the frame will deform and twist. You can't see it. If you find discomfort, pain, dizziness, etc., the first reason may be the deformation of the frame, Need to re adjust the "point line surface", this is a need for professional optometrists to assist the work, it is recommended that you go to the regular professional optical shop to adjust
if it is inconvenient to go out, a disposable paper specially for lens cleaning is recommended. Single chip, easy to carry, no wear lens, camera lens can also be used
Hello, I'm bjdnxq. I'll share it with you on the Internet disk. Click open to save it. The link is permanent^_^ Link:
< Yun class = "ikqb Yun box" data_ Title = "01" Bi mouth, you fake Fen "complete" data_ size="" data_ filelogo=" https://gss0.bdstatic.com//yun-file-logo/file-logo-6.png " data_ number="1" data_ sharelink=" https://pan..com/s/1E5g3zLNyoD2_ TzIMUptJNA" data_ Extraction code: 2w7b
if there is another desired resource or the link fails, you can use the [collect file] function launched by the network disk to ask questions and collect resources. There is no need to save it. It is simple and fast https://pan..com/disk/main#/transfer/list Wechat applet, network disk app and web end are all online
concept is the cornerstone of mathematics. To learn concepts (including theorems and properties), we need to know not only what they are, but also why they are. Many students only pay attention to memorizing concepts, but ignore the understanding of their background. In this way, we can't learn mathematics well. For each definition and theorem, we must know how it is obtained and where it is applied on the basis of remembering its content, Only in this way can we make better use of it to solve problems
look at more examples
careful friends will find that teachers always add some extra-curricular examples and exercises to us after explaining the basic content, which is of great benefit. The concepts and theorems we learn are generally abstract. To concretize them, we need to apply them to the topics. Because we have just come into contact with these knowledge, we are not proficient in using them, Examples help us a lot. In the process of looking at examples, we can concretize the existing concepts in our mind, so that we can have a deeper and more thorough understanding of knowledge. As the examples supplemented by teachers are very limited, we should also look for some examples by ourselves, and pay attention to the following points:
& ᦇ 61548; We can't just look at the skin and not the connotation
when we look at an example, we need to really master its method and establish a broader idea of problem-solving. If we look at one topic and only remember the topic but not the method, we will lose its original meaning when we look at an example. When we look at a topic, we should clarify its idea and master its thinking method. When we encounter similar or similar topics, we will have a general impression, It's easy to do, but it's important to stress that unless you have a good grasp of it, you should not rely on subjective judgment. That way, you will make empirical mistakes and go to a dead end< br /> We should combine thinking with seeing
let's look at the examples. After reading the questions, we can first think about how to do it, and then compare the answers to see what is better than the answers, so as to improve ourselves. Or if our ideas are different from the answers, we should find out the reasons and sum up the experience< br /> Examples at all levels of difficulty are taken into account
examples should be read step by step, which is the same as "doing exercises" later, but there is a significant advantage: examples have ready-made solutions and clear ideas. As long as we follow their ideas, we will come to a conclusion, so we can see some examples that are more skillful and difficult to solve, but not beyond what we have learned, For example, competition questions of medium difficulty
practice more
if you want to learn mathematics well, you must do more exercises, but some students can learn it well by doing more exercises, and some students still can't learn it well after doing a lot of exercises. The reason is whether "doing more exercises" is right or not. What we call "doing more exercises" is not "problem solving tactics". The latter is just doing without thinking, which can't consolidate the concept and broaden the thinking. It also has "side effects": it can't make a mess of the knowledge that has been learned, it wastes time and gains little. What we call "more practice" is to ask everyone to think more about what knowledge it uses and whether it can be solved more, Whether the conclusion can be strengthened and popularized or not, we should really master the methods and do the following three points to make "more practice" really play its role< br /> Must be familiar with all kinds of basic questions and master the solution
every exercise in the textbook is aimed at a knowledge point, which is the most basic topic and must be mastered; Extracurricular exercises, there are many basic questions, the use of more methods, targeted also strong, should be able to quickly make
many comprehensive problems are just the organic combination of several basic problems. If you master the basic problems, you can't worry about solving them< br /> In the process of solving problems, we should consciously pay attention to the thinking methods embodied in the problems, so as to form a correct thinking set
mathematics is a world of thinking, with many thinking skills, so each problem will reflect certain thinking methods in the process of proposition and problem solving. If we consciously pay attention to these thinking methods, we will form a "general" solution to each type of problem in our mind after a long time, that is, the correct thinking set, At this time, it is easy to solve this kind of problem; At the same time, master more ways of thinking, to do a comprehensive problem laid a certain foundation< br /> Do more comprehensive questions
comprehensive questions are popular because they use more knowledge points
doing comprehensive questions is also a powerful tool to test one's learning effect. By doing comprehensive questions, one can know one's shortcomings, make up for them, and constantly improve one's mathematical level
"do more exercises" should be carried out for a long time, several times a day, and only after a long time can it have obvious effect and great harvest
how to deal with the examination
learning mathematics is not for the sake of a simple examination, but the examination results can basically reflect a person's level of mathematics and the quality of mathematics. In order to achieve good results in the examination, the following aspects of quality are essential< br /> Kungfu is used in peacetime. There should be no surprise before the exam. What needs to be mastered in the exam should be mastered well in peacetime. The night before the exam, there should be no tiredness. We must have a good rest. Only in this way can we have enough energy in the exam room. When we take the exam, we should put down the burden, get rid of the pressure, focus on the test paper, analyze carefully and reason strictly< br /> Taking an exam requires skills. After the paper is sent out, you should first roughly look at the amount of questions and roughly allocate the time. If one question takes too much time and you haven't found a way of thinking, you can put it in the past for the time being. You will finish what you will do and think about it carefully later. After one question is finished, don't rush to do the next one, but look at it again, because the thinking in your mind is still clear, It's easier to check. For the answer questions with several questions, you can use the conclusion of the previous question when answering the following questions. Even if the previous question is not answered, you can also use it as long as you clearly state the source of this condition (which is required to be proved by the questions of course). In addition, you must consider the questions carefully, especially the blank questions, Some should indicate the range of values, and some have more than one answer. Be careful and don't miss it< br /> When taking an exam, you should be calm. As soon as some students encounter questions that they can't, their heads immediately heat up. As a result, when they are worried, they can't do what they would have done. This kind of psychological state can't get good results in the exam. We might as well use a self comforting psychology when taking an exam: I can't do the questions that others can't do. (commonly known as the spiritual victory method) maybe it can calm the mood, So as to display their best level, of course, comfort comes from comfort. For those problems that can't be solved at once, we should think hard and try to do as much as we can. There are certain steps