As a doll who took part in the senior high school entrance examination in Huanggang, Hubei, our junior high school math teacher told us that the proposer of the senior high school entrance examination was isolated from the outside world during the proposition period, and the only book he could read during this period was the Junior High School Mathematics Textbook, so many of the senior high school entrance examination questions were actually "after-school exercises variants" of junior high school math textbooks!