bai lang 100 ceng tong (2 Ergebnisse)

paperback. Zustand: New. Language:Chinese.Paperback.Pub Date:2024-04 Publisher:Beijing Science and Technology Press:Where does the water in the pipes we usually use come from and where does it go? The water in the pipes is originally rain that falls on the top of the mountain. After converging into a river. it flows into the water plant. and then after disinfection and purification. it becomes water that people can drink. This clean water is transported to every corner of the city through the water pipes. The water w.

paperback. Zustand: New. Language:Chinese.Paperback. Pub Date: 2024-04 Publisher: Beijing Science and Technology Press: This is a science picture book for children aged 3-8. suitable for parent-child reading or independent reading. Wow. a series of shoe prints! When shoes step on the stagnant water. they will leave shoe prints with different patterns on the ground. The soles of each shoe have uneven patterns. Why is this? These uneven patterns exist to help people walk and run. If you look closely at the soles. you w.