If your school collects the previous graduation thesis as a self-built database, you can find it when you take the exam.

The way to avoid it is not to copy it completely, but to change the statement.

Supplement: Although you changed the sentence, some content may not be found by the machine, but the teacher will repeat the content according to your research content. . . If he has the heart to search, it is easy to find that teachers are thieves ~ (We used a schematic diagram in our graduation project at that time, and the defense teacher said with a smile: This schematic diagram has been wrong several times, and every time someone still jumps into the ditch, it is better to refer to other people's research viewpoints, methods and directions, and then check the information to piece it together.