It is more important to brush the questions, but we should also pay attention to the reasonable arrangement of the examination time. There is skill in answering questions on the spot. It is not difficult to see from the test papers in recent years that the calculation of test questions has increased and the time for answering questions is very tight. The best way is to finish the conceptual and memorable questions in the previous single-choice questions and multiple-choice questions quickly and accurately, so that you can spare more time to do the following questions. When you do a comprehensive question, you should browse the whole question, make clear the questions you want to ask, and then start calculating. Because, often, the questions in these topics are interrelated, and the answer in front is the known conditions of the questions in the back.