2024年全国100所名校AB测试示范卷高三24·G3AB·英语-R-必考-QG 英语(一)答案

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31.What's the purpose of the on-going aircraft simulations in Chicago?A.To popularize the new pattern of air traffic.B.To promote the sales of the electric air taxis.C.To replace commuter rails and public transportation.D.To integrate electric air taxis into existing urban traffic mode.DScientists have confirmed that fossilized footprints found in New Mexico are between 21,000and 23,000 years old-meaning humans existed in North America much earlier than previouslybelieved.It was believed humans existed in North America somewhere between 13,500 and 16,000 yearsago.So,were the prints-some of which look distinctly human with five toes-really between21,000 and 23,000 years old?Researchers from the U.S.Geological Survey (USGS)and other scientists decided to do afollow-up study,using two new approaches to determine the age of the prints.“The immediate reaction in some circles of the archeological(考古的)community was that theaccuracy of our dating was insufficient to make the extraordinary claim that humans were present inNorth America during the Last Glacial Maximum,"said co-author of the new study,Jeff Pigati,aUSGS research geologist."But our targeted methodology in this current research really paid off."The scientists initially used seeds from the Ruppia cirrhosa plant found in the fossils.They usedradiocarbon dating to determine the age of the seeds,but because the plants are aquatic (andcan hold carbon from the water instead of the air,the age estimate could have been off.So,in the new study,they used radiocarbon dating on conifer pollen,which comes from plantson earth,that were found in the same layers as the seeds."Even as the original work was beingpublished,we were pushing forward to test our results with multiple lines of evidence,"said co-authorKathleen Springer,a USGS research geologist."We were confident in our original ages,but we knewthat independent time-related control was critical."The researchers had to isolate 75,000 pollen grainsfrom the same layer and found that their age was statistically identical to the Ruppia cirrhosa seeds.To further check their dating,they also tested quartz grains found in the footprints using adifferent dating process,optically stimulated luminescence.They found the quartz had a minimumage of about 21,500 years.USGS says with three supporting pieces of evidence,it is unlikely the age range of 21,000 to23,000 years is incorrect.32.What can be learned about the newly found fossils?A.They contain diverse sea plantsB.Most of them look like humans'footprints.C.They date bake to the Last Glacial Maximum.D.They will bring about ground-breaking discoveries.英语试题卷第6页（共10页）