1, the difficulty is different. The first model of history focuses on the comprehensiveness of knowledge and is the result of a round of review. It is not difficult to check whether students have knowledge loopholes. The second model is the most difficult mock exam, the most comprehensive, and even more difficult than the college entrance examination.

2. The time is different. The first model of history will be tested in January and February, and some provinces will also take the test in March. The second model will be tested at the end of March or April.