第1个回答 2017-02-22
living organisms accompanied these plate movements; the period was marked by occasional waves of mass extinctions of living creatures. Organisms were also affected by periods of glaciation that followed variations in the earth's orbit and in the output of energy by the sun.
大陆板快,海洋的改变,以及气候对地球生命的进化都有深远影响。地幔上大板快地壳的挤压形成大陆漂移。大陆漂移雕塑了地壳的外观,使现在大陆形成。伴随板块运动,气候改变对活有机体有深远影响。在特定时期的生物大量灭亡高峰是这个时期的见证。生物也受冰河期影响,在冰河期,地球轨道和太阳能的输出都发生了很大变化。
第2个回答 2016-12-08
we picture that day as far in the future. When we are in buoyant health, death is all bu
第3个回答 2016-12-07
e picture that day as far in the future. When we are in buoyant health, death is all but
第4个回答 2017-02-11
ch out in an endless vista. So we