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
2014-03-22
22
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
【C1】
选项
答案
K
解析
空前不定式符号及空后从句提示所填词应为及物动词原形,故可将答案限定在I)create、K)establish和L)ensure中。疑问连接词which提示Tim Flowers和Tony Yeo进行一项为期三年的研究的目的就是明确哪种基因能使植物在含有盐分的土壤中生存。establish是个多义词,主要含义有“建立”、 “安置”及“确定”,其表示“确定”的这个释义不常见,若忽略的话,会很容易误选L)enstire,但ensure后接宾语从句时通常为肯定句,而不是疑问句,故可排除。答案为K)establis
转载请注明原文地址:https://kaotiyun.com/show/jj17777K
0
大学英语六级
相关试题推荐
Researchnowsuggestscompaniesthattrytomakeemployeeshappycouldbenefitfromimprovedlevelsofproductivity.WhereSloug
Barter(以货易货),theexchangeofgoodsandserviceswithouttheuseofmoney,isnotanewidea,butoverthepastdecade,thisty
Oneofthegreatestconcernsparentshavewhenfacinganinternationalmoveis,"Whatschoolwillbeavailabletomychild?Will
A、Toplantmorefastgrowingtrees.B、Tofindnewmaterialsformakingpaper.C、Todevelopnewprintersusingrecycledpaper.D、
A、Theyhaveaprivatetutor.B、Theygotoaregularschool.C、Theyattendaspecialschool.D、Theyaretaughtbytheirparents.
A、Itimpartscoffeeculture.B、Itdoesitsbusinessillegally.C、Itsqueezescompetitorsoutofthemarket.D、Itappliesmachine
FactorsforStressandAnxietyAtsomepointintheirlivesvirtuallyeveryonewillexperiencestressfuleventsorsituation
A、Havedinnerwithhim.B、Writethepaperforhim.C、Gotoclasseswithhim.D、Helphimwiththepaper.D选项均为原形动词开头,且含有with/for
GraduateeducationistheDetroitofhigherlearning.MostgraduateprogramsinAmericanuniversitiesproduceaproductforwhic
随机试题
DWDM系统的构成主要有()和单纤双向两种形式。
对于如图所示的电流i随时间t作周期性变化的图像,下列说法中正确的是()。
对探测器的性能要求,错误的是
干扰叶酸代谢,引起巨幼红细胞贫血的是
治疗脱疽的基本原则是
下列各类疾病中,主要应采取第—级预防的是( )。
安全生产监督检查人员在行使职权时,应当履行的法定义务不包括( )。
关于我国避险策略基金的保本保障机制的说法,错误的是()。
客户不可以通过银行购买的产品有()。
依据《义务教育音乐课程标准(2011年版)》的基本理念,对下面教学设计中的新课教学阶段进行评析。【课程名称】《校园风》【教学对象】八年级学生【教学内容】舞蹈编创【主要目标】运用舞蹈作品的几种表现形式和表现手法进行舞蹈编创。【教学过程片段】1.欣
最新回复
(
0
)