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)2Scientists have made an exciting discovery of ancient human DNA that theysay will allow them to piece together the mysterious ancestry (of thethrough analyses,we can start to look at the genetic ancestry of humans inhave a lookpeople in some areas.that area,"he said."We can start to look at the population history.It just providesa lot more insight than we currently have.please?In 2015,scientists dug a partially preserved human skeleton in a cave inLeang Panninge on the Indonesian island of Sulawesi."It is an extremely rareWhen the pandemic becomes less serious,Brumm plans on doing morefind in the area since the hot and wet environment is exceptionally unforgivingresearch around the region to search for more ancient human DNA."Weour visit?hope there will be more ancient human DNA samples found in this part ofNew York nowto the preservation of the genetic material once the organism dies,"Adamhome for almostBrumm,a professor of archaeology at Griffith University in Australia,andthe world,and maybe they'll provide more insight into who these peoplewere,”he said.busy with hisone of the authors of the study,told a reporteree him instead32.What made the discovery in Sulawesi an extremely rare find?Analysis of the DNA revealed that the body belonged to a femalehave with you?A.The number of the surrounding organismstake no morehunter-gatherer,about 17 or 18 years old,during the pre-Neolithic era.TheB.The unfriendly climatic conditions of the caveyouwoman had been buried in a shallow grave with finely-made stone toolsC.The degree of the human skeleton's preservationwith me now.placed around her body-perhaps as grave offerings,Brumm added.TheD.The complexity of the ground feature of the caveuitcase yourself?woman shares half of her DNA with Aboriginal Australians and the other33.Which of the following are least likely to share the ancestry with the woman?half with the people found in Papua New Guinea.The DNA is part of aA.Polynesians.B.Australians.eed topopulation group that is more closely related to modern-day Near OceanianC.East Asians.D.Papua New Guineanspopulations,which include Australians and Polynesians,than East Asian34.What do Brumm's words in Paragraph 5 mainly tell us?groups,according to the study.A.His interest in the "gateway to Australia"It is the first ancient DNA people have found in Wallacea,a massive regionB.The value of their discovery in Sulawesiard about theof thousands of oceanic islands located between the continental landmassesC.His confidence in solving the local mystery.of Asia and Australia,"Brumm said.Modern humans crossed throughD.The process of using DNA to uncover historyut it?Wallacea on their way to the Australian continent at least 50,000 years ago.35.What's the focus of Brumm's next study?nusic event heldScientists know very little about the movement of humans to the "gatewayA.Investigating the cause of the woman's deathtoB.Analyzing the geographic features of Sulawesi.place?Australia"because early human skeletal remains are exceptionally rarend the weekendin the region.Brumm thinks this distinct culture has always been a bit of aC.Comparing ancient human DNA with modern DNAmystery."So to find ancient DNA from the region is really important because,D.Exploring the cave for more ancient DNA evidence.there?in the fields of第二节（共5小题；每小题2分，满分10分）through the movement of water is greatly minimized.38rap,and alter根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。It prevents chemicals entering groundwater.Unlike other water sprayingardcore punk选项中有两项为多余选项。techniques,drip irrigation delivers water directly to the ground's surfaceare involvedDrip irrigation (refers to the process of dripping water onto the soilinstead of spraying water up and out over the entire area.Consequently,its year?doesn't result in the great runoff of man-made chemicals into the ground-the first kindsurfaces through a system of plastic pipes.The application of water is doneAnd I wantclose to the plant.36Nations which have welcomed drip irrigationwater.39 Both animals and humans can benefit from thatinclude China,the USA,and many others.Why?Drip irrigation has manyIt reduces the risk of erosion ()Soil erosion is known for the removaladvantagesof topsoil by natural forces,like running water.Soil erosion is harmful.40im about the37When we're using drip irrigation systems,the application ofSince drip irrigation doesn't expose much of the soil surface to water,soilgether.water uniformly across the land achieves high levels of water efficiency byerosion is reduced.He can driapplying water only where it's needed.Thus,there's less runoff from bothA.It conserves waterB.It prevents plants lacking waterthe soil and leaves.And research shows drip irrigation is far more effective atC.Drip irrigation is popular worldwide.etting plants make use of the water applied.D.It helps plants get enough nutrition.is picture?It encourages healthier growth of plants.Drip irrigation guarantees the soilE.It may cause a sharp decrease in farmland.always holds some water.Moreover,the drip systems carry out the applicationF.Thus,drinking water quality is better guaranteedG.Besides,weeds which don't get access to water thereby die off.there forof water only at the plant's roots,and the remaining part of the plant and(下转B4版)soilremains dry.Thus,the emergence of waterborne pests which spreadB4中自