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Exam-oriented education and quality-oriented education are quite different. For example, exam-oriented education has a long history, and can realize the maximum justice, while the quality-oriented education is more beneficial to the healthy growth of students. Within a short period of time, exam-oriented education cannot be fully replaced by qualityoriented education. We should correctly understand the relationship between exam-oriented education and qualityoriented education. That is, it is not an either-or thing, the two modes should be organically combined and mutually supplemented. We should constantly perfect and reform the education model so as to establish the education system suitable for our national conditions.

The WENO method, RKDG method, RKDG method with original ghost fluid method, and RKDG method with modified ghost fluid method are applied to singlemedium and two-medium air-air, air-liquid compressible flows with high density and pressure ratios. We also provide a numerical comparison and analysis for the above methods. Numerical results show that, compared with the other methods, the RKDG method with modified ghost fluid method can obtain high resolution results and the correct position of the shock, and the computed solutions are converged to the physical solutions as the mesh is refined.

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