Then, on a specific branch, we can know the geometry, unfolding and folding of the three-dimensional figure in life, and look at the shape of the object from three directions as a classification, and then write it on the whole tree of wisdom. There must be a specific connection between the branches and leaves of the tree of wisdom.
In other words, such a connection can be described by a wisdom book, so the first book of the seventh grade mathematical wisdom tree can be drawn like this.
Five-minute speech 1
Leaders, teachers, referees and athletes:
In this early winter season when chrysanthemums are in full bloom and