1, comparison basis. 53 All-A papers have fewer questions, simpler questions and more comprehensive answer analysis, which is suitable for basic exercises. It is more difficult for primary school students to master the test questions, and it is more difficult for students to do them, which can not achieve the purpose of consolidating review.

2. Good reputation. All-Excellent Volume 53 is a series of books with good reputation and strong authority. The reputation of primary school students' test papers is low and not authoritative enough.