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
69
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] 【C15】
选项
A、Because
B、As
C、Since
D、For
答案
B
解析
该空格要求既要能引导从句,又要在从句中充当语法成分,作mention的宾语。结合备选项,只有As符合要求,意为“正如,依照”。
转载请注明原文地址:https://tihaiku.com/zcyy/3086734.html
相关试题推荐
It_____MikeandMarywhohelpedtheoldmanseveraldaysago.A、wasB、areC、wer
Whileadmittingthattheforecastwas_____uncertain,thescientistswarnedaga
(Paragraph3,Passage4)Scientistsbegantotrymakingsyntheticdiamondstowards
Overthecenturies,scientistshavebeentryinghardtofindsatisfactorysu
Overthecenturies,scientistshavebeentryinghardtofindsatisfactorysu
Overthecenturies,scientistshavebeentryinghardtofindsatisfactorysu
Whycan’tyoudothissmall_____forme?I’vehelpedyouoftenenoughinthepas
Withtheteacher_____me,Ifeelquiteatease.A、helpB、helpedC、helpingD、being
很多科学家相信正是人类的活动使得地球升温。Manyscientistsbelieve(that)itishumanactivitiesthat
After_____forthejobsuccessfully,youaresupposedtoreceivestafftraining
随机试题
AstudyfoundthattheradiationfromCTscans—thetestsregularlyusedto(1
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Nowadays,somethinghasgoneterriblywrongwithouronce-proudAmericanway
在下列何种酶的催化下,胆红素被转化为结合胆红素A.血红素加氧酶 B.葡萄糖醛酸
女性,55岁。患类风湿关节炎多年,长期服用阿司匹林,血红蛋白90g/L,平均红细
最能反映医患关系性质的表述是一种A.陌生人关系 B.信托关系 C.主动
A.阴阳说 B.水地说 C.五行说 D.元气说 E.云气说气的概念源自
属于阴离子型表面活性剂的是A.苯扎溴铵 B.吐温-80 C.司盘-80 D
临床上抗HIV病毒药齐多夫定是通过抑制核苷逆转录酶,抑制DNA链的增长。齐多夫定
增值税纳税人分为()。A.一般纳税人 B.小规模纳税人 C.股份公司纳税人
最新回复
(
0
)