Teacher, I would like to ask why after writing four blocks, only three blocks are displayed, and the second block is not displayed.
P粉019280626
2022-06-30 20:10:08
Teacher, please tell me why after writing four blocks, only three blocks are displayed, and the second block is not displayed. ![1656590956215337.png image.png](https://img.php.cn/upload/image/169/856/232/1656590956215337.png)
The green piece is written incorrectly
Look at your id attribute