The knowledge of compulsory one is rational, which is relatively difficult. In particular, we should have the concept of spatial thinking, just like solid geometry, and have a three-dimensional sense. The first chapter may be a little difficult to calculate the local time and time zone, but as long as you master the most basic algorithm, you can do the problem, especially the light map is more important.
The second chapter is a good understanding. Look at some review materials, such as the place of thermal cycle. Some students don't understand why the air flow rises where it is heated. It's actually quite simple. Let me give you an example. For example, when you burn a firewood pile, where does the smoke come from? You must know it's rising, right? In fact, this is a typical example of rising due to thermal expansion.
The contents of the following chapters are easy to understand, so just memorize them on the basis of understanding.
You said, "I can't remember, and I can't do the problem if I remember." Then I still don't work hard. If you recite it today, but you haven't recited knowledge, it still has no effect! Remember the content of each lesson comprehensively, don't memorize it by rote, and don't read it with your eyes closed every day. In fact, sometimes you don't even know what you're carrying. After reciting, stop and think about what you recited today, and do a few questions to consolidate it.
If you want to close a book, you can figure out how many chapters there are in a book, how many classes there are in each chapter, and what is the content of each class. If you can reach this level, you can definitely get more than 90.
In the study of mathematics, teachers listen carefully when giving lectures, do problems carefully after class and don't ask questions. There is also a wrong book, which sorts out the wrong questions in the exam so that you can really understand them.
This is some of my experience in learning and teaching, I hope it will be useful to you. Hmm. How interesting