All right. Of course it is useful, but it varies from subject to subject. First of all, the college entrance examination questions are representative and involve a wide range. 10 college entrance examination questions basically cover all knowledge points. Understand these problems, the college entrance examination will naturally be no problem. Secondly, the number of questions is not enough. After all, the number of questions is limited and the sea training is not enough. Third, it must be combined with the syllabus of that year. After all, the test sites change every year. If some test sites don't take the test, the training will be meaningless. Fourth, it varies from subject to subject. The knowledge points of mathematics, physics, chemistry, biology and other disciplines are relatively stable and have not changed much, but the language and politics have changed greatly, which cannot be solved by sea tactics.