You'd better do your homework yourself. Don't ask the answer casually. You can improve yourself by thinking step by step. Think about it, you can't find the answer on the learning tool.

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Exercise has the following functions and functions:

First of all, doing exercises can check the effect of our study. The purpose of learning is to master the knowledge composed of concepts and principles. However, in the process of learning, it is not easy to determine to what extent we have mastered the knowledge and what are the defects and deficiencies.

Second, we can deepen our understanding of knowledge by doing problems. As we said above, it is impossible to thoroughly understand and master the relevant principles and laws only through the elaboration and explanation in textbooks and several examples and exercises.

Third, doing problems helps to improve our ability to analyze and solve problems. The purpose of learning, on the one hand, is to remember and understand all kinds of knowledge, and more importantly, to improve our ability to solve practical problems. Problem-solving exercises are the best way to exercise our ability to analyze and solve problems.

In a word, doing problems occupies a very important position in our study, and it is very necessary for mastering knowledge, cultivating ability and testing learning effect. Only by carefully completing homework and actively exerting the special function and role of each exercise can we effectively improve our thinking ability and deepen our understanding of knowledge.