2. Public courses such as politics and foreign languages for postgraduate entrance examination are a unified proposition of the state, and specialized courses are set by NTU itself.
3. What to test depends on the specific major: generally, politics, foreign languages and two professional courses. I suggest you go to official website of Northeastern University to check the enrollment brochure and the master's professional catalog, or Baidu search "Northeastern University 20 15 master's professional catalog" to find out.