Difficult. It's good to use Wan Wei paper in the seventh grade, but the difficulty coefficient is very difficult. Wan Wei's small paper is a basic question, Wan Wei's big paper is a promotion question, and the paper is a weekly test and a special topic, with comprehensive questions. Wan Dawei's paper is aimed at the difficulty of the senior high school entrance examination questions, combined with the content and knowledge points of the textbook and imitated the characteristics and structure of the real questions, and made some extensions and expansions.