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
What do plants do when they are thirsty?
What do plants do when they are thirsty?
admin
2010-01-15
85
问题
What do plants do when they are thirsty?
We all scream for water when thirsty. (15[A]) But do you know in very hot, dry weather plants also make faint sounds— as if they’re crying out for help?
You see, in a plant’s stem there’re hundreds of "water pipes" that bring water and minerals from the soil all the way up to the leaves. As the ground turns dry, it becomes harder and harder for the plants to do this.
In severe droughts, plants have to fight to pull out any water available. Scientist Robert Winter has found out that when it is really bad their water pipes snap from the tension like rubber bands. When that happens, the whole plant vibrates a little. The snapping pipes make noises 10,000 times quieter than a whisper.
Robert knows that healthy, well-watered plants are quiet. (16[D]) He also knows that many insects prefer attacking dry plants rather than healthy plants. How do the insects know which are healthy plants and which are not? Robert thinks that the insects may listen for the plants that cry. And then they may buzz in to kill.
To test his theory, Robert is using a device that can imitate plant cries. He attaches it to a quiet, healthy plant so the plant sounds thirsty. Then he watches insects lo see if they attack more often than usual.
If he is right, scientists could use the insects’ ability against them. (17[D]) They could build traps that imitate crying plants. So when the insects buzz in to eat, they won’t buzz out.
选项
A、Quiet plants.
B、Well-watered plants.
C、Healthy plants.
D、Thirsty plants.
答案
D
解析
细节题。文章中说:他也知道,比起健康的植物来,很多昆虫更愿意攻击干枯的植物。选项D 中的thirsty plants 就是指这里的dry plants,因此本题要选这一项。
转载请注明原文地址:https://kaotiyun.com/show/U46K777K
0
专业英语四级
相关试题推荐
Thebizarreanticsofsleepwalkershavepuzzledpolice,perplexedscientists,andfascinatedwritersforcenturies.Thereisan
Therelationshipbetweenpersonallibertyandsocialobligationhasbeenanoldtopicsinceancienttimes.Inthefollowingexce
ThefollowingaretwoexcerptsaboutartificialintelligenceorAI,anoldtechnologywithrecentprogressthankstodeeplearni
Mentalhealthproblemslikefeelinglonelyarenowadaysseenquiteoftenamongcollegestudents.Althoughthemajorityofpeople
Itisgenerallyacceptedthatpeopleshouldvisittheiragedparentsregularlyiftheyliveseparately.Butwhetherthisrequire
A、Peoplebecomingmoreaggressiveandruder.B、Thedeclineofpeople’smoralquality.C、Thelackofpatiencewithothers.D、Alo
ThePressConferenceI.AdvantagesofthePressConference—theeventitselfhaving【T1】________
A、Takinganoperation.B、Injectiontherapy.C、Blooddonation.D、Takingmedicine.C对话中在主持人说过铁元素过多的治疗方式有些原始后,Sharon说,确实很神奇,只是简单的捐献
ThreeConceptsinArtHistoryI.Commonalities-Certainchunkof【T1】______,withinwhich【T2】______weresharedII.
NightFloweringPlantsEveningPrimroseThesesoft-scentedflowershavefoursatinyheart-shapedpetalsthatcometogetherformi
随机试题
A.垂体ACTH微腺瘤B.小细胞性肺癌C.肾上腺皮质腺瘤D.肾上腺皮质腺癌E.肾上腺皮质结节状增生(2006年第123题)引起异位性ACTH综合征的原因是
案例B金属制品有限公司,创办于1998年,注册资本880万美元。其核心业务是电镀铝合金轮毂,主要从事铝合金表面处理,表面镀层有铜、镍、铬;对高低档铝合金制品均可进行电镀加工。该企业有员工450人,占地空间4.8×104m2。B金属制品有限公司粉尘
关于混凝土结构缺点的说法,正确的是()。
(2011年真题)下列关于法律效力等级的表述,正确的是()。
若用浓度为30%和20%的甲、乙两种食盐溶液配成浓度为24%的食盐溶液500克,则甲、乙两种溶液应各取().
2002年5月31日,江泽民“五.三一”讲话强调,增强贯彻“三个代表”的自觉性和坚定性,必须做到()。
Withthepaceoftechnologicalchangemakingheadsspin,wetendtothinkofourageasthemostinnovativeever.Wehavesmartp
GB/T12504—1990标准中对计算机软件质量保证计划进行了规范,要求(),必须指明成功运行该软件所需要的数据、控制命令以及运行条件等信息;必须指明所有的出错信息,含义及其修改方法;还必须描述将用户发现的错误或问题通知项目承办单位或项目委托单
Cyberspace,datasuperhighway,multi-media-forthosewhohaveseenthefuture,thelinkingofcomputerstelevisionandtelephone
Accordingtotheauthor,thedistinctionbetweenviolentactsandnon-violentonesinsportsis______.Inthelastparagrapht
最新回复
(
0
)