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
25
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
【C7】
选项
答案
A
解析
空前系动词及空后介词by提示所填词应为动词的过去分词。根据常识不难推断heat(高温)会导致水蒸发,故所填词应该含有“蒸发”之意,答案为A)evaporated.(蒸发)。
转载请注明原文地址:https://kaotiyun.com/show/xj17777K
0
大学英语六级
相关试题推荐
It’sasimplecalculus,kidsandmoney:Frombirthuntilcollegegraduation,childrenconsumedollarslikethey’rechickennugge
Twentyyearsagothisweek,theBritishinventorTimBerners-Leecreatedtheworld’sfirstwebpage.Itisworth【B1】______theex
Scientistshavediscoveredstrandsofgeneticcodelinkedtoshortsight,themostcommoneyedisorderintheworld.Thefinding
Oneofthegreatestconcernsparentshavewhenfacinganinternationalmoveis,"Whatschoolwillbeavailabletomychild?Will
Here’smoreproofthatmostpeoplehavehabitsthataren’tveryhealthful—andsometimescanbeplaindisgusting.Forastud
A、Doubtful.B、Opposing.C、Supportive.D、Neutral.B短文在提出话题后,给出了两方的意见和看法,一方是消费者群体,另一方是政府机构。短文中提到后者的态度是disagreedstrongly,[B]中的Oppo
A、Thefast-developingtechnology.B、Thepeoplewhodesigndifferentapplications.C、ThewayhowpeoplemakeuseoftheInternet.
Cigarettesaregoodforyourthroat,accordingtoadvertisementsfromhalfacenturyago.Todaysuchclaimsareunthinkable,as
Cigarettesaregoodforyourthroat,accordingtoadvertisementsfromhalfacenturyago.Todaysuchclaimsareunthinkable,as
Alcoholhasapeculiarrelationshiptohappiness.Wedrinktocelebrate,butbecausealcoholworksasadepressant,itendsupd
随机试题
《国务院办公厅关于进一步激发文化和旅游消费潜力的意见》指出,到2022年,实现全国文化和旅游消费场所互联网售票和4G/5G网络覆盖率超过(),文化和旅游消费便捷程度明显提高。
人类基因组DNA含有的碱基对高达
A、肾小球B、集合管C、远曲小管初段D、髓袢升支粗段E、远曲小管远端和集合管螺内酯利尿作用部位在()。
测量钉桩时,扶桩人员应站位于锤击方向的正面()
根据《水利水电工程施工合同和招标文件示范文本》(GF—2000—0208),承包人不能提出增加费用和延长工期要求的暂停施工条件包括()等。
宋词分豪放派和婉约派。下列词句的作者同属豪放派的()。
设函数f(x)与g(x)在[a,b]连续,且f(x)≤g(x),则对任何c∈(0,1),有()。
在面向对象方法中,对象之间进行通信的构造称为()。
Whichofthefollowingregionsintheworldwillwitnessthesharpestdropinlifeexpectancy?
A、Becauseofthestressfactors.B、Becauseoftheleisureactivities.C、BecauseoftheTVwatching.D、BecauseofthegeneralAme
最新回复
(
0
)