高三下U4

 https://docs.google.com/presentation/d/1iuidnFN06shJFz3AuV53z2yKme0peYtu/edit?usp=drive_link&ouid=118389955841692397006&rtpof=true&sd=true

高三 U3 下

https://docs.google.com/presentation/d/1Ij165TXkE_6Mm2wGq_zz4J8qWyNb9Ghc/edit?usp=drivesdk&ouid=118389955841692397006&rtpof=true&sd=truetrue