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
2023-09-25
61
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
demand of ecology
解析
本题询问三种理论分别聚焦于什么。根据短文结尾部分The three major theories have focused on climate change,the demand of ecology,and social competition可知,三种理论分别聚焦于气候变化、生态需求和社会竞争。
转载请注明原文地址:http://tihaiku.com/zcyy/3044188.html
相关试题推荐
Thispassagemightbetakenfrom______.[br]Whichdoyouthinkwouldbethebe
Thispassagemightbetakenfrom______.[br]"Accident-prone"here(inPara.2)
WhendoesAnnusuallycomebackhome?Shecomesbackby.______[originaltext]
[originaltext]W:Hello,UtopiaProducts.JennyButlerspeaking.HowcanIhelp
[originaltext]W:Hello,UtopiaProducts.JennyButlerspeaking.HowcanIhelp
[originaltext]M:Hi,Lucy!Haven’tseenyouforages!Whatareyoudoingnow?W
[originaltext]W:Youdidn’tcarefortherestaurant,didyou?M:I’llsayIdid
[originaltext]M:Wherehaveyoubeenallthistime?Thetrainisabouttoleave
[originaltext]W:Wouldyouliketoopenyourownbusiness?M:Iwouldn’tminda
[originaltext]M:HowaboutphoningLizandaskinghertojoinusfordinner?W:
随机试题
I’vealwaysbeenanoptimistandIsupposethatisrootedinmybeliefthat
Weknowwehavetoread"betweenthelines"togetthemostoutofanything.
下列算法中()是非对称加密算法。A.DES B.RSA C.IDEA D.
健康管理在健康保险中的主要作用包括()A.增加销售渠道 B.延伸保险服务
三氯化铁呈色反应A:适用于具有芳胺及其酯类药物或酰胺类药物的鉴别 B:适用于具
电动车的反光镜是用来观察车后情况的平面镜,在某次行驶时,发现左侧反光镜中看到的是
已知某污水总固体含量680mg/L,其中溶解固体420mg/L,悬浮固体中的灰分
托收业务的主要当事人有()。A、委托人B、汇出行C、提示行D、托收行E、
甲、乙两公司采用合同书形式订立了一份买卖合同,双方约定由甲公司向乙公司提供100
4月1日,股票指数为1500点,市场利率为5%,股息率为1%,期现套利交易成本总
最新回复
(
0
)