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
2011-01-22
26
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 recently 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 little slat 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 word "affect" in Paragraph 6 could be best replaced by ______.
选项
A、influence
B、effect
C、stop
D、present
答案
A
解析
词汇题。affect与effect虽然词义相同,但是词性不同,因此不能选B。正确答案应为influence(影响)。
转载请注明原文地址:https://kaotiyun.com/show/XkUd777K
本试题收录于:
职称英语综合类A级题库职称英语分类
0
职称英语综合类A级
职称英语
相关试题推荐
WhereHaveAllOurVisitorsGone?Sixtyyearsago,amannamedKennethArnoldsawsomethingthatpeoplearestill【C1】______t
FalseFearofBigFishManypeoplebelievesharks(鲨鱼)aredangerousandwillalwaystrytohurtorevenkillhumans.【B1】____
Readingthejobad,hewonderedwhetherhewaseligibletoapplyforit.
LackofOxygenDelayedtheRiseofAnimalsonEarthScientistshavelongspeculatedastowhyanimalspeciesdidn’tflourish
Theworkersfinallycalledoffthestrike.
HumanandCultureHumanbeingsareanimals.Webreathe,eatanddigest,andreproducethesamelifeprocessescommontoal
HumanandCultureHumanbeingsareanimals.Webreathe,eatanddigest,andreproducethesamelifeprocessescommontoal
Jackconsumesapoundofcheeseaday.
NormanBlarneyisanartistofdeepconvictions.
Walking—likeswimming,bicyclingandrunning—isanaerobicexercise,(31)buildsthecapacityforenergyoutputandphysicalend
随机试题
构成教育法律责任的前提条件是()
张某和季某经过数年艰苦笔耕,于1995年3月共同创作完成了长篇小说《城春草木深》。张某于2002年6月1日病故,季某于2006年10月6日辞世。根据我国《著作权法》,该长篇小说著作财产权的法律保护期终止于()
患者,男,15岁。平素体健,每于剧烈运动后出现胸闷、咳嗽和呼吸困难。其最可能的诊断是
下列哪些研究没有对照组并因此归为分析性研究
影响检验的可靠性的因素包括()。
行政机关依法变更或者撤回已经生效的行政许可时,给公民、法人或者其他组织造成财产损失的,行政机关应当依法()。
“凡属正确的领导,必须从群众中来,到群众中去……如此无限循环,一次比一次地更正确、更生动、更丰富。这就是马克思主义的认识论。”这段话指出了
执行下面的程序段后,S的值为【】。s=5Fori=2.6To4.9Step0.6s=s+1Nexti
Readthetextbelowaboutopinionsonethicsandmissionstatements.Inmostofthelines(34-45),thereisoneextraword.Itis
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchangesthatyoungadultsexperience.Andtheyalsoneed
最新回复
(
0
)