It's not difficult. When I took the A exam, I watched the explanations on B站 and practiced the questions. By the next day, I finished all the questions in a few minutes and just sat there during the exam. My score was 29/30, and I clearly remember that the last question was completely new, a calculation problem. However, the probability of encountering new questions shouldn't be too high, so it won't affect your passing. Finally, here's a suggestion: try to understand rather than just memorizing. I often forget everything after a while, and now I'm studying with the sixth edition of the book.
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