Is it necessary for liberal arts to buy five or three?
This is necessary. It is also necessary for liberal arts to buy "May 3rd". The knowledge of liberal arts is broader and wider, and you need to know more to do well in the exam. Basically, every knowledge point is covered in the "May 3 rd", with simple questions and difficult problems, and the difficulty is similar to that of the college entrance examination mathematics, so I want to buy liberal arts.