Triple integration is definitely necessary and not difficult. The key point is to master those integration methods, such as projection method, cross-sectional area method, column coordinate, spherical coordinate and so on. It will be difficult to read the real question directly. I suggest you do simple questions first. Find a few simple questions to understand each type in the world first, and then look at the real questions, you will find that it is not that difficult. Stokes formula does not belong to triple integral, but is the content of curve and surface integral. If you can't fuse curves and surfaces, you need to work hard. In fact, it is not difficult. The key is to be able to distinguish each type clearly, know it after seeing it, and then remember each solution. As I said before, don't look at the real questions directly, look at the simple questions first. Multivariate function integral is a compulsory part of the exam, so it is easy to get points as long as you do more questions. It's a pity to give up. For example, for example, you will carefully review the differential function of one variable, but the examination questions may be more difficult and you may not get high marks. Generally speaking, as long as you review well, it is easy to get points for the calculus part of multivariate functions. Stokes formula is not easy to be tested, and sometimes problems can be worked out without it, without review; Just remember the definitions of circulation, curl, divergence, gravity and inertia. If you think it is too much, you should at least remember gravity and inertia. If you don't know the concept in the exam, you may lose the score of a big question. Integrals with parametric variables don't seem to be in the outline, so you don't need to look at them. I wish you success, there is still a lot of time, work hard, focus on the problem, and remember that it is easy before it is difficult.