Countdown to the College Entrance Examination, My Wrong Questions Can Be Upgraded

During his first test in the senior year of high school, Zhou Yan had a total score of 412 and a grade of 638. I went through a lot of questions, but I could make the same mistake three times in a row. Until he got the "wrong question correction system" - he could only correct one real wrong question every day, no answers were provided, no knowledge was imparted, and the entire formal exam was silent. Zhou Yan originally thought that it would be too late to correct a question in one day. Later he discovered that the dozens of points he repeatedly lost often came from the same wrong habit. One question about the wrong domain of definition led to seven errors from the same source. Seven days later, his math went from sixty-two to one hundred and eighteen. From grade six hundred and thirty-eight, to top scorer in the college entrance examination. Zhou Yan has only one thing to do: never make the same mistake twice.