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
Scientists have created a tomato that can grow on salty water. The plant is the first crop of its kind ever produced in the worl
Scientists have created a tomato that can grow on salty water. The plant is the first crop of its kind ever produced in the worl
admin
2011-02-04
56
问题
Scientists have created a tomato that can grow on salty water. The plant is the first crop of its kind ever produced in the world.
Its significance can not be overestimated (高估). The new technology can help mankind solve the problem of feeding its ever-expanding population. It is estimated that by 2025 the world population will amount to more than 9 billion, an increase of 3 billion over 2000. Each day 240,000 more people are born, ready to be fed like the rest of us. Unfortunately, not all the land on Earth can be used to grow crops for humans. About 24.7 million acres of the problem is irrigation (灌溉). When farmers water their crops, salts in the water also enter the soil. Over time, salts such as sodium (钠) and calcium (钙) build up to such a point that they severely harm the growth of crops. Salts destroy most plants’ ability to draw up water through their roots.
But, the new variety of tomato produced by American and Canadian scientists can store salts in its leaves so that the fruit doesn’t taste salty. Researchers hope this technology will enable areas of poor-quality land to become productive (多产的). And they can feed some of the world’s growing population.
Why do salts left in the soil harm the growth of crops?
选项
A、They are poisonous to the plant.
B、They contain sodium and calcium.
C、They upset most plant’s ability to draw up water through their roots.
D、They destroy the soil’s ability to water plant.
答案
C
解析
细节题。根据第二段最后一句Salts destroy most plants’ ability to draw up water through their roots. 可知,盐可以破坏很多植物通过根系吸收水分的能力,故选C。
转载请注明原文地址:https://kaotiyun.com/show/wtlK777K
本试题收录于:
大学英语三级A级题库大学英语三级分类
0
大学英语三级A级
大学英语三级
相关试题推荐
A、Morethanoneyear.B、Morethantwoyears.C、Threeyears.D、Fouryears.BHowlonghasthemanbeenlearningEnglish?
Howdoesthespeakercommentthisclearancesale?Thisis______.thatHarrison’shaseverhad.Whydidgrandfatherlookupse
Accordingtothepassage,tobeasuccessfulsalesman,one______.Inthethirdparagraph,"potentialcustomers"referstopeop
ForPrivateIndividualClassifiedAdsLetChinaDailyclassifiedsectionsellyourstuffandmarkyourimportantdays.It’s
A—artificialintelligenceB—knowledgeeraC—commandandcontrolD—computerizationE—intellectualprope
A、Someonebrokeintothewoman’shouseandstolesomejewels.B、Sheknewhowtheburglarsbrokeintoherhouse.C、Shedidn’tkno
A、At17:00onFridayevening.B、At7:00onFridayevening.C、At6:30onFridayevening.D、At7:00onFridaymorning.BWhenwill
Theroommatewakedmeupandsaid,"It’shightimewe______."
______thatourknockingcouldnotwakehimup.
Therewere______forSaturday’smovie.
随机试题
在美国行政组织改革过程中,放松规制的措施有()
在靶细胞内具有第二信使作用的物质是
患儿1岁半,半天来打喷嚏、发热,1小时前突然抽搐持续2分钟。去医院途中抽搐停止,神志清。查体:发育正常,体温38.5℃,前囟已闭,咽充血,心、肺无异常,颈无抵抗。该患儿最可能是
下列有关急性硬膜下血肿手术治疗的适应证中不正确的是
栝蒌瞿麦丸主治的是
票据贴现属于银行的()。
录入凭证:2011年1月8日广义科技有限公司出纳开出现金支票提取现金1000元备用。2011年1月9日,以现金800元购买办公用品。
我和父亲感情极深,但直至他老人家临终我都没能说一句“爸爸我爱你”,不是不想说而是说不出口。我二十几岁时看西方电影,见外国人搂着老父亲说“爸爸我爱你”,心中感慨万分,就决心在儿子身上试验。当儿子可以交流的时候,我就和儿子深情地说:“儿子,爸爸爱你。你得说,我
A、 B、 C、 D、 A线性表、栈、队列和双向链表都是典型的线性结构;而二叉树是典型的非线性结构。【知识拓展】什么是线性结构?有3个衡量标准:①有且只有一个根结点;②每个结点最多有一个前件(直接前驱),也
ItwasveryfinewhileIgotupearlylastSundaymorning.【76】______SoIdecidedtogoforawalkandtooksomephotosint
最新回复
(
0
)