The winter vacation of the experimental class is well connected. Because there are many books in the winter vacation of the experimental class, they are "from textbooks" and "higher than textbooks". The topic is a little more difficult, and strengthening practice will improve your grades. The scope of investigation is wide, and important knowledge points are involved. The color printing and typesetting of the experimental winter vacation connection is very refreshing, there is no middle dividing line, and the overall printing is very friendly. The number of questions tends to be more appropriate, and the number of words is one page. The answer is explained by video, interspersed with "folk culture literacy and whole book plan", suitable for Chinese New Year and big reading.