Traditional Culture Encyclopedia - Traditional virtues - "A waterwheel is like a spinning wheel, made of fine bamboo. At the end of the front end of the wheel, a bamboo tube is tied. When it rotates, it scoops water at a low position and drains water at a h
"A waterwheel is like a spinning wheel, made of fine bamboo. At the end of the front end of the wheel, a bamboo tube is tied. When it rotates, it scoops water at a low position and drains water at a h
"A waterwheel is like a spinning wheel, made of fine bamboo. At the end of the front end of the wheel, a bamboo tube is tied. When it rotates, it scoops water at a low position and drains water at a high position. " Agricultural tools introduced in the above historical materials
B
This question examines the historical facts about subway cars. The agricultural tool introduced in the above historical materials is a truck that can realize automatic irrigation. It first appeared in the Tang dynasty, so I chose B.
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