The epicentre of an earthquake is the point on the Earth's surface nearest to the site of the earthquake.An earthquake produces waves.These waves spread out from the epicentre of the earthquake and travel along the Earth's surface.(a) One wave is emi
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/10 19:03:41
xTM0$!D`TuM[vv`rJXޣv2F`6/?uo;Q{`j`Y/zvF