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》话题4新研究阅读下面短文，从每题所给的A、B、C、D四个选项中选出最佳选项。真题同源外文素材腾i远原创好题Thousands of farmers in China have started to grow a remarkable newversion of rice,one that realizes an old scientific dream.lt's a perennial(多年生的)form ofthe grain,which doesn't have to be planted a new each season,but grows year after yearfrom long-lived roots in the soil just as many wild grasses do.Researchers at Yunnan University in Kunming,China,worked for more than twodecades to create this rice.Their perennial rice,they report,requires much less labor,dramatically reducing a farmer's costs while producing about the same amount of grain.Itslong-lived roots may deliver big environmental benefits,too,although scientists need moredata to confirm that.Many farmers are attracted to perennial rice because it takes less work.Perennial rice still accounts for a rather small part of China's total harvest.According toZhang,one of the leaders of the Yunnan University research group,it's too early to estimatehow widely it could spread.In theory,at least,it could grow across the tropics ()It isbest adapted to places with plenty of water,such as irrigated lowland paddies,and it can'tsurvive freezing winters.For some researchers,the Chinese rice varieties are a sign that it's possible to createperennial alternatives to today's major crops.Wheat,rice and corn,which have to bereplanted each year,have brought up humanity for centuries,but growing them causesserious damage to the environment.Farmers generally clear their fields for planting by tillingthe soil,which degrades it and exposes it to water and wind erosion (A large Chinese company has thrown its weight behind perennial rice,promoting it in anonline video.The company has announced field trials of the new rice in Uganda,incooperation with that country's Academy of Agricultural Sciences.1.Why does the perennial rice appeal to many farmers?A.It increases rice yield.B.Its roots live longer.C.It can save labor force.D.Its growth is good.2.Which word best describes Zhang's attitude to the wide spread of perennial rice?A.Indifferent.B.Satisfied.C.Negative.D.Conservative.3.What advantage does perennial rice have over today's major crops?A.It takes little landB.It benefits environment.C.It can grow annually.D.It can feed more people.4.What can we know about perennial rice from the last paragraph?A.It will be extended widely.B.It may solve the world hunger.C.It needs further advertising.D.It is helping developing countries.183