The emphasis of advanced mathematics lies in the second volume, and the difficulty lies in the first volume. The hardest part is the mean value theorem. Don't concentrate on it. Few people will do it if the problem is simple. The key point is the integration of curves and surfaces, which is the key point.

It is very important to pay attention to the theorem in the textbook when reviewing mathematics, and I didn't really know it until I finished the exam.

Mathematics review must pay attention to summing up, not just doing problems, it's time to start doing problems.

Do "400 t" for three times, and you should get 1 10 points.