Hehe, the garbage is terrible, and the teacher is not professional. All your problems depend on Baidu. If you can't answer them, say you just recited the answer directly. Make your own plan a, your own teacher doesn't need it. They recorded and played the video a long time ago, but some of the contents of the video and the teaching materials were not quite right, so students had to come and find the wrong one before they changed it. And those exam questions are all online and not original.