中考2024年陕西省初中学业水平考试 YJ③样卷(三)3答案(英语)正在持续更新，目前2024届最新高考模拟示范卷答案网为大家整理了相关试题及答案，供大家查缺补漏，高效提升成绩。

本文从以下几个角度介绍。

1、子卷22024年陕西省初中学业水平考试英语
2、2024年陕西省初中学业水平考试英语模拟试题(三)
3、陕西省2024年初中毕业学业考试模拟试题四
4、2024陕西省初中毕业学业考试英语
5、陕西省2024初中学业水平考试
6、子卷22024陕西省初中学业水平考试英语答案解析
7、2024年陕西省初中学业水平考试模拟卷(四)
8、2024年陕西省初中学业水平考试英语
9、2024年陕西初中毕业学业考试英语
10、2024陕西省初中学业水平考试英语答案

大单元学三步一体高效训练讲评had been discovered at White Sands National Park in New Mexico.Researchers identified about 60礼记fossilized(石化的)footprints..By dating seeds(种子)in the footprints,.the US Geological Surveyestimated the prints were up to 23,000 years old.So,the 2021 study said humans could have crossedfrom Asia into the Americas 26,000 to 19,000 years ago,through land connecting what is nowRussia and Alaska,during the last ice age.This discovery upset other theories of how human beings came to populate the Americas,andhow long ago.It challenges the once-conventional wisdom that humans didn't reach the Americasuntil a few thousand years before rising sea levels covered the Bering land bridge between Russia andAlaska about 15,000 years ago.The debate about the footprints was all about the way the age of the seeds was determined-anda separate group of scientists in 2022 published a study that said the seeds were much younger than23,000 years.Questions focused on whether seeds of aquatic plants used for the original dating mayhave absorbed ancient carbon from the lake-which could,in theory,throw off radiocarbon dating。■■■==。▣■■=▣==■44(放射性碳定年法)by thousands of years.In a new study published on Thursday,scientists from the 2021 study undertook multipleindependent age estimates of the White Sands footprints,involving samples of pollen grains and twodifferent sediments,which pointed to the same approximate age."It is highly unlikely that they areall incorrect and,taken together,provide strong support for the 21,000-to 23,000-year age rangefor the footprints,said Jeff Pigati,a research geologist with the US Geological Survey."The dating issue is not yet solved because we don't know when the footprints were buried,"said Loren Davis of Oregon State University,who added there are methods available that candetermine that."Until that information is available,the issue will remain unsolved."32.What's the finding of the 2021 study?A.Humans arrived in the Americas after the last ice age.B.60 fossilized footprints were much younger than 23,000 years.C.Rising sea levels covered the Bering land bridge 23,000 years ago.D.The peopling of the Americas occurred earlier than traditionally thought.33.What could influence the result of radiocarbon dating in theory?A.Whether the seeds were from the lake.B.Whether the seeds took in ancient carbon.C.The species of the seeds in the footprints.D.The location of the seeds in the footprints34.What can be inferred about the new study published on Thursday?A.It was conducted by scientists of the 2022 study.B.It figured out the exact time when the footprints appeared.C.It found harder evidence to support the 2021 study.D.It made many interrelated age estimates of the footprints.35.What's Loren Davis'attitude toward the findings of the US Geological Survey?A.Doubtful.B.Approving.C.Carefree.D.Dismissive.【答案与解析】研究表明，人类可能在2.3万年前就已定居美洲，这与早先认为的1.5万年时间线有很大出入。32.D根据第1、2段可知，2021年发表在《科学》杂志上的一项研究称，在新墨西哥州的白沙国家公园发现了北美已知最古老的人类脚印，它们表明人类可能在2.6万到1.9万年前来到美洲，远早于人们过去认为的1.5万年。33.B根据第3段的最后一句可知，疑问关注的是用于测定原始年代的水生植物种子是否吸收了湖中的古碳一从理论上讲，这可能会影响放射性碳定年法的测定结果。2025ZCYK·英语-YLB-选择性必修第一册-QG