(1) Read it carefully. First, take a cursory look at the textbook to understand the basic ideas, and then read it carefully over and over again. When reading carefully, you can draw the key points, difficulties and difficult problems in the textbook with colored pens.

(2) think hard. When previewing, we should make use of the existing knowledge, experience and relevant reference materials, think actively, ask more why, and find out the internal relationship between the old knowledge and every concept, law and formula in the new content. if

(3) Ask for advice with an open mind. In the process before the makeover, some problems have not been solved despite independent thinking (including looking up information), so you can discuss with your classmates, ask your teacher, parents [Weibo] or others if necessary, and try to always solve them before class, so that you can concentrate on thinking about some new problems in class.

(4) Do some exercises and practical operations appropriately.

(5) Take notes carefully.

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