I'm a Lego player and I'm in Lego. This is my work - arch bridge knowledge points: First, understand the important role of bridges in life, help people easily pass through rivers and other uneven

I'm a Lego player and I'm in Lego.

This is my work – arch bridges

Knowledge Points:

First, recognize the important role of bridges in life, and help people easily pass through uneven places such as rivers. It has bridge holes and stairs. Bridge holes over small boats. Arch bridges are divided into single arch bridges and multi-arch bridges. According to the material, it is divided into wooden arch bridge and stone arch bridge.

Second, the learning and application of the ladder structure

Difficulty: Learn to build a ladder structure and understand the interlocking structure.