I discovered the secret of sunflower in Yu Linwei (/kloc-grade 0/5), the fourth grade in Cunjin Campus. There are several sunflowers on the roof of my house. They always face the sun all day. When the sun rises in the east in the morning, it raises a smiling face at the sun. At noon, the sun goes straight to the top of the head, and it holds its head high and faces the sun; At night, it also turns its head to the west with the sun. I can't help thinking: Why do sunflowers turn to the sun every day? Is there any magic in the sun that attracts sunflowers to it? Does the light from the sun contain substances that sunflowers like? Isn't it ... I have a long list of question marks, hoping to find the answer in a pile of books. After studying hard for a few days in the sea of books, I finally found the answer in an unknown teacher-"100,000 Why". In fact, the sun has no magic, and there is nothing sunflower likes. It's just that there is a strange auxin on the stem of sunflower. This strange auxin is sunlight. ...