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
52
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
【C6】
选项
答案
G
解析
空前介词及空后助动词提示所填词应为名词,由短语a series of可知,所填词应为复数名词,故可将答案限定在B)barriers和G)droughts中。根据常识可知,the water table todrop(地下水位下降)是由干旱引起的,故答案为G)droughts(干旱)。
转载请注明原文地址:https://kaotiyun.com/show/GK27777K
0
大学英语六级
相关试题推荐
TheGeneralElectricCompany,oftencriticizedforthecomplexityofitsstructureandtheresultingopacityofitsnumbers,sai
EmergencyRoomsMillionsofAmericansvisitanemergencyroomeachyear.MillionsmorehaveseenthehitTVshow"ER".This
A、OfficialsfromtheNewYorkPoliceDepartment.B、OfficialsfromtheNewYorkfederalgovernment.C、OfficialsfromtheNewYork
HowtoSurviveaLayoffYou’velostyourjob,butit’snottheendofyourcareer.Getthehelpyouneedtosetyoubackon
HowtoSurviveaLayoffYou’velostyourjob,butit’snottheendofyourcareer.Getthehelpyouneedtosetyoubackon
ScientistssaytheyhavehighhopesforadrugthatcouldonedayprovideanewformoftreatmentforHIV-AIDS.Acompound,whic
Everyculturehasitsownbodylanguage,andchildrenabsorbitsnuancesalongwiththespokenlanguage.AFrenchmantalksandm
Everyculturehasitsownbodylanguage,andchildrenabsorbitsnuancesalongwiththespokenlanguage.AFrenchmantalksandm
Australia,thelast【B1】______tobe“discovered”,wassightedbyDutch,Portuguese,andSpanishshipsintheseventeenthcentury
中国服饰不仅是随着时间演变,还经常随着朝代的更替或者新统治者的圣旨(theImperialdecree)而发生巨大变化。在古代的封建社会(feudalsociety),人们的等级和地位可以轻松地通过日常衣物区分开来。上层统治阶级中,只有皇帝可以穿黄色
随机试题
在Access2010中,_______查询可以根据一个或多个表/查询中的数据来新建表。
下列哪种情况,A,B两病灶投影重叠
该患受累的颅神经是对进一步治疗及预防,最重要的检查是:
制备溶液型液体药剂时的注意事项( )。
1921年,在马克思列宁主义同中国工人运动相结合的进程中,中国共产党应运而生。中国共产党能够在众多的党派中取得革命的领导权,成为中国革命和社会主义事业的领导核心,就是因为中国共产党的根本宗旨与众不同。我们党同一切剥削阶级政党和其他团体的根本区别是(
自然常识课上,教师通过做水的加温和降温实验,让学生观察水的三态变化,这种教育方法是()
()
编制16PF量表采用的是()
中国资产阶级民主革命是由孙中山为代表的资产阶级革命派首先发动的。作为本阶级的政治利益代言人,资产阶级革命派形成的阶级基础是
请在“考试项目”菜单上选择“演示文稿软件使用”菜单项,完成以下内容:打开指定文件夹下的演示文稿yswg7(如图),按下列要求完成对此文稿的修饰并保存。1.将第二张幻灯片对象部分的动画效果设置为“溶解”;在演示文稿的开始处插入一张“标题幻灯片”,
最新回复
(
0
)