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The seismograph
In this lesson, you will learn what a seismograph is and how earthquakes are measured.
地理
成绩10 – 12
作者: Kalmár Vanda
审稿人: Dormány Gábor, Jóri Johanna
图形的: Patai Regina
程序员: Gálea Patrik
关键词
mozaLink
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