New theories propose that catastrophic impacts of asteroids and comets may have caused reversals in the Earth's magnetic field, the onset of ice ages, splitting apart continents 80 million years ago, and great volcanic eruptions.


splitting apart continents

the splitting apart of continents

split apart continents

continents split apart

continents that were split apart

考题讲解
还没有题目讲解(毕出老师会陆续发布对官方考题的解读,请保持关注)。

登录注册 后可以参加讨论

OG2015-SC