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
2023-10-10
39
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] 【C19】
选项
A、soon
B、early
C、often
D、long
答案
B
解析
根据上文,科学界对于人类何时开始生活在地球上没有定论,这为解答该题提供了线索。整句表达的是人类最早什么时候开始在地球上生存这一问题。结合选项,early符合句意。how soon意为“多久”;how often用于提问频率;how long意为“多长时间,多久”。
转载请注明原文地址:https://tihaiku.com/zcyy/3086738.html
相关试题推荐
It_____MikeandMarywhohelpedtheoldmanseveraldaysago.A、wasB、areC、wer
(Paragraph3,Passage4)Scientistsbegantotrymakingsyntheticdiamondstowards
Overthecenturies,scientistshavebeentryinghardtofindsatisfactorysu
Overthecenturies,scientistshavebeentryinghardtofindsatisfactorysu
Overthecenturies,scientistshavebeentryinghardtofindsatisfactorysu
Whycan’tyoudothissmall_____forme?I’vehelpedyouoftenenoughinthepas
Withtheteacher_____me,Ifeelquiteatease.A、helpB、helpedC、helpingD、being
Whydon’tbirdsgetlostontheirlongmigratory(迁徙)flight?Scientistshave
Scientistsintheworldareexpectedtofinda(n)______totheproblemofoverp
很多科学家相信正是人类的活动使得地球升温。Manyscientistsbelieve(that)itishumanactivitiesthat
随机试题
12ThingsI’veLearnedFromTravelingAroundtheWorldforThreeYears
There’sNoPlaceLikeHomeOnalmostanynightofthewee
Auniversitygraduatedescribedasa"respectableandintelligent"womanis
“凡能找到的书都要读一读。但是又切切不要忘记精读……。第一遍可囫囵吞枣,这叫享受
A.弹性模量较大 B.构件刚度较差 C.变形性较大 D.对建筑物的抗震有利
以下各项中,()不属于由于人身风险导致的财务风险。A.王某是钢琴家,在车祸中
一男性患者从高处摔下,足部着地,主诉右腰部疼痛,肉眼血尿,应考虑A.肾实质损伤
建筑电气装置施工中,配电柜安装固定后的紧后工序是()。A.开箱检查 B.
身高增长的影响因素不包括A.睡眠 B.官内生长水平 C.短期疾病及营养波动
6岁,男孩,发热1天。前两天每天腹泻14~16次,为黏液性脓血便,腹痛伴里急后重
最新回复
(
0
)