Very good. It would be great to get a perfect score of 150 and 147. Only three points were deducted, indicating that the basic knowledge is solid and you can use your knowledge flexibly to solve related problems. The second grade refers to the second grade of junior high school, and the eighth grade in nine-year compulsory education can also be called the second grade. The basic introduction refers to the eighth grade in the nine-year compulsory education of the second grade of junior high school, which can also be called the second grade, the second grade and the eighth grade.