首页
登录
职称英语
What does this passage tell us? It tells us why our brains______. [br] [origina
What does this passage tell us? It tells us why our brains______. [br] [origina
游客
2024-07-03
21
管理
问题
What does this passage tell us? It tells us why our brains______. [br]
Human brains are about three times as large as those of our early ancestors that lived four million to two million years ago, and for years, (11)scientists have wondered how our brains got so big. (12) A new study suggests social competition could be behind the increase in brain size.
Compared to almost all other animals, human brains are larger as a percentage of body weight. (13) And since the emergence of the first species about two million years ago, the human brain has doubled in size. And when compared to earlier ancestors, (14)such as those that lived four million to two million years ago, our brains are three times as large. For years, scientists have wondered what could account for this increase.
The three major theories have focused on climate change, the demand of ecology, and social competition.
选项
答案
doubled in size
解析
本题询问自从第一物种出现以后,人类的大脑发生了怎样的变化。根据And since the emergence of the first species about two million years ago,the human brain has doubled in size可知,从二百万年前物种起源到现在,人类的大脑增大了一倍。
转载请注明原文地址:https://tihaiku.com/zcyy/3660450.html
相关试题推荐
Whatdoesthispassagetellus?Ittellsuswhyourbrains______.[br][origina
Whatdoesthispassagetellus?Ittellsuswhyourbrains______.[br][origina
Whatdoesthispassagetellus?Ittellsuswhyourbrains______.[br][origina
[originaltext]W:I’dliketo(8)sendthisparceltoAmerica.M:OK.(8)Pleasep
[originaltext]W:I’dliketo(8)sendthisparceltoAmerica.M:OK.(8)Pleasep
[originaltext]W:I’dliketo(8)sendthisparceltoAmerica.M:OK.(8)Pleasep
[originaltext]W:AreyougoingtoCassie’sbirthdaypartyonSaturdayevening?
[originaltext]M:Howaboutthewhiteoneontheleft?Itscheaper.W:Theblu
Whatwasthepurposeoftheauthortowritethepassage?[br]ThementionofBri
Whatwasthepurposeoftheauthortowritethepassage?[br]Howmuchfull-time
随机试题
Idon’tthink_______possibletomasteraforeignlanguagewithoutmuchmemoryw
Tofindouthowmuchholidayscost,youshouldpressbutton[br][originaltext]
改善民生我们必须要优先发展农业,建设人力资源强国
隧道仰拱宜超前拱墙二次衬砌,对于承受围岩压力较大的拱墙,封顶和封口混凝土要求达到
初种麻疹减毒活疫苗的时间是A.生后2个月 B.生后4个月 C.生后8个月
血液中的高浓度脂肪蛋白质含量的增加,会使人体阻止吸收过多胆固醇的能力增加,从而降
校园文化是影响学生发展的因素之一,在课程类型上,它属于()。 A.科学课程
某国有商业企业主营业务为销售某国外品牌化妆品,是增值税一般纳税人,增值税税率为
下列各项中,属于一般存款账户可以办理的业务有( )。 A.日常经营活动的资金收
有架空进线的3~1OkV变配电所的配电装置(包括电力变压器),防雷电侵入波过电
最新回复
(
0
)