The first round is the screening stage, which means whether you can choose or not has nothing to do with time. It's all machine screening. It's all because of bad luck Even if you choose the first course, you will be kicked out. But the first round is also very heavy. You have to decide what course to take and see when the second round is the key. For example, Ma Ji Maodeng's compulsory courses and school courses, if you want to choose after being kicked out, you have to grab the places for the second round. It can be said that it is robbing because some courses are very popular, and the third round is