What was invented by Zhang Heng to detect a distant earthquake?
举一反三
- What was invented by Zhang Heng to detect a distant earthquake? A: star catalogue B: seismometer C: sundial D: compass
- ________________, invented by Zhang Heng, can indicate the direction of a distant earthquake. It was over 1,700 years later that a similar instrument was invented in Europe.
- Zhang Heng also invented the Guide Chariot.
- Zhang Heng invented the world’s first water-powered armillary sphere and the world’s first seismometer.
- By watching the armillary sphere made by Zhang Heng, one could find out ______.( ). A: the rising and falling of the stars B: how an eclipse developed C: when an earthquake would strike D: the rotation speed of the earth