1, content. The content of primary school students' A test questions is more comprehensive and the knowledge points examined are wider. However, 15-day perfect score is difficult to prepare for the exam, and the scope of investigation is narrow.

2. Test materials. Primary school Xueba Chong A has a rich question bank, which can quickly help review the contents of key exams and is very friendly to pre-test counseling. However, 15 full mark preparation involves a relatively one-sided question bank.