✔ 最佳答案
1.name: Zhang Heng
2.birth: 78
3.his invention is: Seismoscope.It has eight dragon's heads holding brinze ball
s. When there was an earthquake, one of the mouths would open and drop its
ball into a bronze toad at the base, making a sound and supposedly showing th
e direction of the earthquake.
4.the effect of this invention: This invention make the later period to have a fo
undation to make a new one. This make our to know where have an earthquak
e to do some prevention work make we more safely.
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