托福听力:2011.8.21托福听力考试机经回顾
托福听力 half uncontious sleeping for whale and dolphin. Half of the brain will sleep for 2 hours, only 1 eye open, the contious half brain will pay attention to the environment/danger and make sure the whale come to the surface to breath. An article stating that the mother whale will not sleep for a whole month because of the infant; not necessarily true, the infant need to breath every 30 sec? and the infant has not fat yet therefore it needs to swim all the time to keep up body temprature. 某女生找老师谈话,她想改project研究方向。夏天去某native american res... [ 查看全文 ]托福听力:2011.8.21托福听力考试机经回顾的相关文章