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Brush 60 class hours and record 30 class hours. How do you know how much you have brushed?
There are two steps in the theory of wisdom in primary and secondary schools: 1. Open the PPT of national wisdom education in primary and secondary schools, and click "2022 teacher summer training". This page will show the total hours of 40 hours and how many hours you have completed.

2. The following are the research objects. If you study, it will show your study time and how many hours you count.