首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The United Nations says the world’s population will increase by 34 percent by the year 2050. Scientists and others know it will
The United Nations says the world’s population will increase by 34 percent by the year 2050. Scientists and others know it will
admin
2017-02-24
46
问题
The United Nations says the world’s population will increase by 34 percent by the year 2050. Scientists and others know it will be difficult to meet the food needs of so many people. A recent study shows that soybean crops and computers may help deal with the problem.
The U.N. predicts food production must increase by 70 percent to meet the needs of a richer population. The U.N. expects more people will live in cities than in rural areas. But today there is lit tie too low increase in the productivity of major crops. Kenneth Quinn is the president of the World Food Prize Foundation. He says the need to increase food production is the greatest difficulty humanity has ever faced, "There’ s going to be another 2 billion people on our planet between now and 2050 and how are we going to produce enough food for them to eat?" asked Quinn.
Darren Drewry is a scientist at the American Space Agency, NASA. He led a study of soybeans which NASA calls the world’ s most important protein crop. He says researchers using a computer were surprised to find that they were able to create a soybean plant that can be both more productive and use less water. "We find that there are changes to the architecture of modern soybean cultivars can be made to help us improve on many of these goals," said Drewry. Researchers were able to increase soybean productivity by 7 percent without using more water. The computer helped researchers do work that would have taken many years in the field. The next step is to test the computer ’s design.
We spoke to Stephen Long about that. He is a professor at the University of Illinois, and one of the writers of the report on the soybean study. He told us by Skype that researchers used computer program to study what would happen if they changed the way the plant grows. "One of the things the modelling predicted is that there’s too much leaf area so we’re actually removing leaves as the plant’s growing to get a lower leaf area. We’re also artificially modifying the angle of the leaves as well to reflect what the model predicted," said Long. Professor Long says it is important to find solutions to the predicted global food shortage before it happens. He says it will be 20 years before farmers can begin growing a more productive soybean once they have developed it.
The study on soybeans was published in the journal Global Change Biology. The National Science Foundation, NASA and the Bill & Melinda Gates Foundation paid for the study.
What special qualities will the new soybean plant have?
选项
A、It can be more productive yet require less water.
B、It will be taller and stronger.
C、It will have less leaves and more productivity.
D、It will require less water and fertilizer.
答案
A
解析
推断题。根据文中a soybean plant that can be both more productive and use less water可以推断出新品种的特性是产量高,需水少。因此,正确答案是A。
转载请注明原文地址:https://kaotiyun.com/show/EhU7777K
0
大学英语六级
相关试题推荐
Since2007,theAmericanPsychologicalAssociation(APA)hasconductedasurveyofdifferentaspectsofstressinAmerica.Thisye
Itiscommonlyheldthatdrinkingmoderateamountsofalcoholcanreducetheoddsofhavingadeadlyheartattack.More【B1】_____
Itiscommonlyheldthatdrinkingmoderateamountsofalcoholcanreducetheoddsofhavingadeadlyheartattack.More【B1】_____
A、Itwasnotreallyamagazine.B、Itfeaturedavarietyofarticlesandstories.C、Itwaspraisedbyreadersofpoetry.D、Itwas
IfthepopulationoftheEarthgeesonincreasingatitspresentrate,therewilleventuallynotbeenoughresourcesleftto【B1】
A、Hisparentsareheadinghomeforthetimecoming.B、Hisparentsarecomingbackthistimenextyear.C、Hisparentsliveinano
JustlikeChinese,Westernersgivegiftsonmanyoccasions,suchas,onbirthdaysoffamilymembers,atweddings,atChristmasa
JuanLouis,ajuniorgeologymajor,decidedtogivean【B1】______speechabouthowearthquakesoccur.Fromhisaudienceandanalys
JuanLouis,ajuniorgeologymajor,decidedtogivean【B1】______speechabouthowearthquakesoccur.Fromhisaudienceandanalys
A、ThemanmaypickuptheglassesonWednesday.B、Theman’sglasseshavebeenfixedalready.C、Themanmaypickuptheglasseso
随机试题
1773年1月16日发生的波士顿倾茶事件,是一场由波士顿“自由之子”所领导的政治示威事件。这次事件成了()的导火线。
前列腺良性增生时指肛检查触及的腺体特征不正确的是
患者,女性,50岁,反复咳嗽、咳痰6年,每逢冬季加重。2周来上述症状加重,并咳脓痰,体检双肺底可闻及湿性啰音。此患者最可能的诊断是A.支气管哮喘B.支气管扩张C.慢型喘息型支气管炎D.慢性支气管炎急性发作期E.慢性阻塞性肺气肿
下列关于内生肌酐清除率的叙述,正确的是()
法洛四联症的四种病理变化中最重要的是()
账务处理与工资核算系统之间的数据是通过()自动完成的。
银行信用是银行和各类金融机构以()形式提供的信用。
某一会计事项是否具有重要性,在很大程度上取决于会计人员的职业判断。对于同一会计事项,在某一企业具有重要性,在另一企业则不一定具有重要性。()
在不与我国缔结或加入的有关国际条约相抵触的情况下.国家对农民实施价格补贴和销售量补贴政策,具体办法由国务院制定。()
安居乐业对于()相当于()对于乱世
最新回复
(
0
)