首页
登录
职称英语
Fire, scientists agree, helped give rise to a successful, thriving human pop
Fire, scientists agree, helped give rise to a successful, thriving human pop
游客
2023-10-11
12
管理
问题
Fire, scientists agree, helped give rise to a successful, thriving human population by providing heat for cooking and protection from the cold.
But they don’t agree【C1】______when humans began using fire. Some researchers argue that it【C2】______more than a million years ago when early humans【C3】______their way to Europe from Africa, and【C4】______say it happened much later. Now, a new study reveals that humans did not【C5】______fire until about 400 000 years ago.
Two archaeologists(考古学家)in the US report their【C6】______in the current issue of the Proceedings of the National Academy of Sciences. They looked at excavation(发掘)reports and studies from 141 sites in Europe that were【C7】______1.2 million and 35 000 years old. They think there is no clear evidence of【C8】______fire use until about 400 000 years ago. In Africa,【C9】______there are several sites where there was evidence of fire, those may have been【C10】______fires that occurred in the African grassland.【C11】______, there are also sites older than 400 000 years in Europe that indicate the【C12】______of humans, with the oldest, in Spain, more than a million years old. This means that【C13】______Europe’s extreme winter climates, early humans found a way to【C14】______without the warmth of a fire.【C15】______the researchers mention, early humans are【C16】______and persistent(坚持的). But some researchers【C17】______that it is still a puzzling explanation and it still【C18】______some serious thinking about how【C19】______the human being could have survived on a seasonally【C20】______food supply despite having small teeth and small guts. Up to now, no one has solved this problem yet. [br] 【C2】
选项
A、occurred
B、recurred
C、discovered
D、invented
答案
A
解析
分析句意可以判断it指的是上一句中的using fire,再结合后面的时间状语,可以推知一些研究者认为在100多万年前人类就开始用火了,所以选occurred。recurred意为“重现;复发”;discovered意为“发现”;invented意为“发明,创造”。
转载请注明原文地址:https://tihaiku.com/zcyy/3089061.html
相关试题推荐
Scientistshaveidentifiedthelikelyculpritinadiseasethathasdevastat
Scientistshaveidentifiedthelikelyculpritinadiseasethathasdevastat
Scientistshaveidentifiedthelikelyculpritinadiseasethathasdevastat
Ateamofscientistshasjustfinishedwhatmightliterallybedescribedas
Ateamofscientistshasjustfinishedwhatmightliterallybedescribedas
_______thecalculationisright,scientistscanneverbesurethattheyhavein
"Throwitaway?Thereisnoway,"scientistswarnusso.Whatthatmeans,of
"Throwitaway?Thereisnoway,"scientistswarnusso.Whatthatmeans,of
"Throwitaway?Thereisnoway,"scientistswarnusso.Whatthatmeans,of
ScientistsintheUnitedStateshavedevelopedacomputerprogramthatthey
随机试题
Hemeanttellingusaboutit,butheforgottotellus.A、tobetellingB、telling
[originaltext]W:Haveyouchosenyourelectivefornextsemesteryet?Areyout
水利工程质量监督的依据不包括()。A.审核的施工组织设计 B.国家相关的
曲线与x轴所围图形面积为()。A.0 B.2 C.4 D.6
化学法粪便隐血试验灵敏度高的是A.联苯胺法B.愈创木酯法C.无色孔雀绿法D.邻联
下列市场调查的内容中,属于可控因素调查的是( )。A.市场需求容量调查 B.
去甲肾上腺素A.主要作用于α受体 B.主要作用于β受体 C.主要作用于β1受
新生儿溶血症有可能发生于A.Rh母亲首次妊娠,血型为Rh的新生儿 B.Rh母亲
下列关于消费税纳税义务人的说法,不正确的有( )。A.零售金银首饰的纳税人是消
“十三五”时期,我国经济社会发展应以提高发展质量和效益为中心,以()为主线。A.
最新回复
(
0
)