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
"Salty" Rice Plant Boosts Harvests British scientists are breeding a new generation of rice plants that will be able to grow
"Salty" Rice Plant Boosts Harvests British scientists are breeding a new generation of rice plants that will be able to grow
admin
2015-07-17
33
问题
"Salty" Rice Plant Boosts Harvests
British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.
Tim Flowers and Tony Yeo, from Sussex University’s School of Biological Sciences, have spent several years researching how crops, such as rice, could be made to grow in water that has become salty.
The pair have recendy begun a three-year programme, funded by the Biotechnology and Biological Sciences Research Council, to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops, starting with rice.
It is estimated that each year more than 10m hectares (公顷) of agricultural land are lost because salt gets into the soil and stunts (妨碍生长) plants. The problem is caused by several factors. In the tropics, mangroves (红树林) that create swamps (沼泽) and traditionally formed barriers to sea water have been cut down. In the Mediterranean, a series of droughts have caused the water table to drop, allowing sea water to seep (渗透) in. In Latin America, irrigation often causes problems when water is evaporated (蒸发) by the heat, leaving salt deposits behind.
Excess salt then enters the plants and prevents them functioning normally. Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.
To overcome these problems, Flowers and Yeo decided to breed rice plants that take in very litde salt and store what they do absorb in cells that do not affect the plants’ growth. They have started to breed these characteristics into a new rice crop, but it will take about eight harvests before the resulting seeds are ready to be considered for commercial use.
Once the characteristics for surviving salty soil are known, Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants. Land that has been abandoned to nature will then be able to bloom again, providing much needed food in the poorer countries of the world.
The attitude of the author towards the research project is______.
选项
A、positive
B、negative
C、suspicious
D、indifferent
答案
A
解析
四个选项的意思分别是:肯定的(positive)、否定的(negative)、有怀疑的(suspicious)、冷淡的(indifferent),从全文看作者对他们的研究无疑是肯定的。
转载请注明原文地址:https://kaotiyun.com/show/46Gd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
TheWeddellsealofAntarcticacandivetoadepthofabout,1,600feetandremainsubmergedforaslongasanhourandtenminu
GenerationGapAfewyearsago,itwasfashionabletospeakofagenerationgap,adivisionbetweenyoungpeopleandtheir
MobilePhoneandDiseasesAstudybyscientistsinFinlandhasfoundthatmobilephoneradiationcancausechangesinhuman
MobilePhoneandDiseasesAstudybyscientistsinFinlandhasfoundthatmobilephoneradiationcancausechangesinhuman
ANewFindingBritishcancerresearchershavefoundthatchildhoodleukaemiaiscausedbyaninfectionandclustersofcase
HowtoEducateChildrenAsEleanorRooseveltoncesaid,“Universalhumanrightsbegininsmallplaces,closetohome.”And
HowtoEducateChildrenAsEleanorRooseveltoncesaid,“Universalhumanrightsbegininsmallplaces,closetohome.”And
HoldthetorchsteadysoIcanseebetter.
ArcticMeltEarth’sNorthandSouthPolesarefamousforbeingcoldandicy.Lastyear,however,theamountoficeintheArctic
TheCaribbeanIslandsWhatwouldyouseeifyoutookacruisetotheCaribbeanIslands?Palmtreesandcoconuts(椰子)?Whiteb
随机试题
下列哪一项不属于计划的功能()
患者男,6岁。自幼皮肤黏膜有出血症状,血小板计数120×l09/L,血涂片可见血小板散在分布,出血时间,ADP、胶原和花生四烯酸诱导的血小板聚集减低和不聚集,加瑞斯托霉素引起的聚集减低。该患者正确的诊断是
MR图像质量指标不包括
某建筑公司兼营运输业务,2018年发生的业务如下:(1)与甲建筑公司签订一项建筑承包合同,金额3500万元,又将该工程的一部分分包给乙建筑公司签订合同,分包金额1000万元。(2)3月31日,与丙企业签订一协议,公司承租丙企业设备1台,每月租赁费1
客户的信贷需求和信贷动机是银行的()。
2018年7月1日,A、B两公司签订了一份价值100万元的货物买卖合同。合同约定:A公司于2018年7月15日向B公司交付全部货物,交付地点为B公司仓库;B公司在验货合格后10日内一次性支付全部货款;任何一方如违约,应向守约方支付违约金10万元。合同订立后
一旦领导企业扭亏行动的cEO们建立起便于大家精诚合作的组织结构,他们就需要对员工授权,________。公司领导层应该传达出这样的信息:他们现在期望员工表现出主动性。填人横线处最恰当的一项是()。
Baliisanislandbelongingto______.HowdidthepeopleofBalipreventfightingfrombreakingout?
A、Hedroveoutoftiletownandtriedtoescape.B、Hewentdirectlytothepolicestation.C、Hearguedwiththepoliceangrily.
Manisalandanimal,butheisalsocloselytiedtothesea.【B1】______historytheseahassurvivedtheneedsofman.Theseaha
最新回复
(
0
)