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
19
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] 【C20】
选项
A、movable
B、adjustable
C、variable
D、modifiable
答案
C
解析
空格前的副词seasonally表明,食物供给受季节影响,不稳定且易变。空格中所填的词必须能和前面的副词构成搭配。variable“多变的,易变的”符合句意。movable意为“可移动的"adjustable意为“可以调节的”;modifiable意为“可修饰的;可更改的”。
转载请注明原文地址:https://tihaiku.com/zcyy/3088193.html
相关试题推荐
Scientistshaveidentifiedthelikelyculpritinadiseasethathasdevastat
Scientistshaveidentifiedthelikelyculpritinadiseasethathasdevastat
Scientistshaveidentifiedthelikelyculpritinadiseasethathasdevastat
Ateamofscientistshasjustfinishedwhatmightliterallybedescribedas
Ateamofscientistshasjustfinishedwhatmightliterallybedescribedas
Thinkofsomethingyoulearnedsuccessfullyinyourlife(e.g.aschoolsubject,
"Throwitaway?Thereisnoway,"scientistswarnusso.Whatthatmeans,of
"Throwitaway?Thereisnoway,"scientistswarnusso.Whatthatmeans,of
"Throwitaway?Thereisnoway,"scientistswarnusso.Whatthatmeans,of
"Throwitaway?Thereisnoway,"scientistswarnusso.Whatthatmeans,of
随机试题
Whatisthepossiblereasonthatsomefoodspromotethebrainperformance?[br]
经产妇,35岁,GP,前两胎均经阴分娩,本次为意外妊娠,足月有产兆后住院,静滴0
下列除哪项外均为大黄的主治病证A.痰饮喘咳 B.湿热痢疾 C.热毒疮疡 D
患儿,女,10个月。因面色苍白2个月来医院就诊。患儿生后单纯母乳喂养,未添加辅食
在构建岗位胜任特征模型的方法中。()属于定量研究。A:编码字典法 B:专
采用两难故事法研究儿童品德发展问题的心理学家是()A.柯尔伯格 B.皮亚杰
(2020年真题)根据劳动合同法律制度的规定,劳动合同终止的下列情形中,用人单位
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
(2019年真题)漏电保护装置主要用于防止间接接触电击和直接接触电击防护,下列关
最新回复
(
0
)