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
British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their w
British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their w
admin
2013-11-12
31
问题
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 recently begun a three-year programme, funded by the Biotechnology and Biological Sciences Research Council, to【C1】______which genes enable some plants to survive salty conditions. The aim is to breed this【C2】______into crops, starting with rice. It is estimated that each year more than 10m hectares of agricultural land are【C3】______because salt gets into the soil and stunts plants. The problem is caused by several factors. In the tropics, mangroves(红树林)that【C4】______swamps and traditionally formed【C5】______to sea water have been cut down. In the Mediterranean, a series of【C6】______have caused the water table to drop, allowing sea water to seep in. In Latin America, irrigation often causes problems when water is【C7】______by the heat, leaving salt deposits behind. Excess salt then enters the plants and prevents them functioning【C8】______. 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 little 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【C9】______use. Once the characteristics for surviving salty soil are known, Flowers and Yeo will try to breed the【C10】______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.
A)evaporated I)create
B)barriers J)capability
C)normally K)establish
D)economic L)ensure
E)excluded M)capacity
F)lost N)commercial
G)droughts O)appropriate
H)perfectly
【C5】
选项
答案
B
解析
分析句子结构可知,所填词在句中作formed的宾语,故应为名词。且该名词能与介词to搭配使用,故可将答案限定在B)barriers、M)capacity中。第2句提示本句是举例说明每年会有10万公顷的农业用地变为盐碱地的原因。本句的定语从句主要讲的是mangroves的作用。结合句子语境及常识可知,mangroves能阻挡海水侵入热带雨林的土壤中,故答案为B)barriers(障碍,屏障)。
转载请注明原文地址:https://kaotiyun.com/show/FK27777K
0
大学英语六级
相关试题推荐
A、It’sanotherwaytoloseweight.B、It’sverycheap.C、It’snotsocrowded.D、It’snearby.D女士说娱乐中心离她的住处很近,故选D。
Atranslatormusthaveanexcellent,up-to-dateknowledgeofhissourcelanguages.Hemustfillfacilityinthehandlingofhis
Peoplewithpanicdisorderhavefeelingsofterrorthatstrikesuddenlyandrepeatedlywithnowarning.Theycan’tpredictwhen
HowtoSurviveaLayoffYou’velostyourjob,butit’snottheendofyourcareer.Getthehelpyouneedtosetyoubackon
Thatexperiencesinfluencesubsequentbehaviourisevidenceofanobviousbutneverthelessremarkableactivitycalledrememberin
A、Heisveryforgetful.B、Helikestoplaytricks.C、Histestsaredifficult.D、Itiseasytopasshiscourse.C推理判断题。女士咨询选Mr.Sm
Everyculturehasitsownbodylanguage,andchildrenabsorbitsnuancesalongwiththespokenlanguage.AFrenchmantalksandm
Everyculturehasitsownbodylanguage,andchildrenabsorbitsnuancesalongwiththespokenlanguage.AFrenchmantalksandm
Thisisaparticularmomentinthehistoryofdigitalnetworks,onewhenpowerfulcorporateactors(参与者)andhigh-performancenetw
A、Itstillcanbeused.B、Itwillbreakdown.C、Itshouldbethrownaway.D、Itwillbecomebent.A事实细节题。短文中提到人们可以把这种“万能购物卡”对折起来,
随机试题
单克隆抗体不可应用于检验医学诊断的是
关于假释,下列哪些选项是错误的?()(2008/2/57)
雨水管渠断面形式中,管道都是施工前预制的,其优点是施工比较方便,进度也快,但在相同排水能力的情况下,工程投资高于暗渠,并且预制管径一般小于()mm
夜班劳动是指劳动时间在()。
在一定条件下,对于密闭容器中进行的反应:N2(g)+3H2(g)2NH3(g),下列说法能充分说明该反应已经达到化学平衡状态的是()。
主送机关必须是受文机关中级别层次高的机关,抄送机关则必须是其中级别层次低的机关。()
货币政策是政府调控宏观经济的基本手段之一,当通货膨胀较为严重时,应该采取的货币政策是:
简述罪责刑相适应原则的基本内容与体现
高个子的孩子一般能够比较容易地摸到高架子,矮个子的孩子摸到高的架子一般比较困难。现在已知矮个子的孩子比高个子的孩子更可能变成矮个子的成年人。所以,如果教会矮个子的孩子容易地摸到高架子,那么他们变成矮个子的成年人的比例将会下降。上述论证中的推理错误是
Theyear1972wasmarkedbypublicationofacontroversialbook,TheLimitstoGrowth.Thisstudyoftheworld’sfuture,doneby
最新回复
(
0
)