全国100所名校最新高考冲刺卷英语2023届Y1
2023-11-20 01:47:10
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changedHewaomm1.What can be the best r the e34.WA.Desalination technigues meeting limited successB.Waysfefrinkner obalyC Theofacing therdce.D.Neweveloped or of re aterD35.Vr(水蒸气)The orld'r fodrmust be plted again fter everyhrdy from thevest.That ofork forersand can cnibute totproblem su第a new equip-soi(侵h).This year,eenChin showed variety一perennial(多年生选fresh water)icethoudrgwfter harvest without the need to replant,meet needs.The variety wasreated yrby mixing acommThai rice witha wild rice from Af-ated(评估)rica that can srviveexremelyifficuroment.However,improving the varietys pro-iticture capableduction and quality was a challenge and took more than two decades.Finally,in 2018,re-e into freshsearchersa Yunnan Universityand ther institutions released Perennial Rice 23(PR23)tosantinued cli-farmers in China,hoping to find out how many times the rice can be harvested and measureusthe production and other benefits.Thanks to technical assistance from Yunnan University andiques havegovernment,more and more farmers are growing PR23,and it is even being tested in Africation facto-as well.water pro-PR23produced just as much grain as regular,seasonally planted rice,the team reported.o add newHowever,by the fifth year,production dropped much,meaning that the perennial rice needsto be replanted.Farmers could reduce a major task:transplanting young rice seedlings intoause pro-the fields,helping lower farmers'costs by half.Soil nutrients (also increased in thenough tofields containing perennial rice.But researchers still need to develop a new variety suitable forthe drier environments and soil with little nutrients.ement ofResearchers also worry about long-term impacts.One concern is that weeds and some dis-gh theireases will increase in the fields that are not plowed ()requiring more chemicals to killsible forthem than traditional rice does.Another question is whether the rice gives off more green-uctureshouse gas.Despite the facts,its low costs and other benefits of perennial rice should comeinto focus when the planting spreads.n water32.What is the feature of the perennial rice?A.It doesn't require harvesting in time.B.It can damage the soil for a long time.oped.C.It needn't replanting after every harvest.D.It takes a long period of time to grow.33.Why did researchers release PR23 to farmers in China in 2018?A.To test its quality.B.To spread it to AfricaC.To announce their success.D.To mix it with a Thai rice.【V高-英语第6页(共10页)V】
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