a. The preface to Carmina Burana is magnificent and dignified, and the composer seems to try to build a temple by singing and listening; The first part of the formal song, "Spring", is light and bright, which contains a long distance. The male and female voices in the chorus alternate like the day and night changes in the time series.
If the copyright of foreign music is complicated, domestic music can also consider the following:
B. The Story of Spring and Red Plum Praise
Of course, you can only make a rough choice here, and the real choice depends on the content of PPT, whether it is for publicity or reporting to leaders. The background music you choose will be very different. But generally speaking, you can't jump too much.
under special circumstances, sometimes cartoon images are made to promote legal knowledge, and the music should be light-hearted first.