Is the QR code of the sixth-grade people's education edition math textbook all free to listen to?
The QR code above is free to listen to. If it can be scanned, we usually use WeChat to scan the code. After scanning the code, I will pay attention to the official WeChat account. After paying attention to the official WeChat account, I can listen to those textbooks for free, or I can choose to download them, mainly because I like them!