Two batches. They are the sample papers of master students and doctoral students respectively. Details are as follows:

1. Sampling inspection of master's thesis: Beijing Municipal Education Commission conducts sampling inspection of master's thesis of universities in the city every year, which is generally divided into two batches. The first sampling time is generally in April each year, and the second sampling time is generally in June 65438+ 10.

2. Sampling inspection of doctoral dissertations: The Beijing Municipal Education Commission conducts sampling inspection of doctoral dissertations of universities in the city every year, which is generally divided into two batches. The first batch of sampling time is generally in June each year, and the second batch of sampling time is generally in 65438+February each year.