Choosing 20 1 1 year is relatively simple. 19, 20, 2 1 The second question with three answers has two questions to be classified and discussed, but the idea of solving the problem is not difficult to think of, but the 22 questions are basically useless. But the first question of 22 questions is easy to be fooled, and only 1 point can be deducted.
Personally, I don't think it's difficult, but I don't know if the written answer is right or wrong. Many people say that the two major problems in physics are difficult (I am the first in all subjects, so I think it is not difficult), and many people around me have never done it.
Generally speaking, I think this year's questions are more difficult than last year's.