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
2015-06-27
20
问题
What do plants do when they are thirsty?
We all scream for water when thirsty. But do you know [15A] 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. He also knows that [16D] 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 to see if they attack more often than usual.
[17D]If his is right, scientists could use the insects’ ability against them. 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
[B]和[D]的意思正好相反,故其中之一很可能是答案。由…many insects prefer attacking dry plants rather than healthy plants可知答案为[D],[D]中的Thirsty plants是原文中dry plants的同义转述。
转载请注明原文地址:https://jikaoti.com/ti/ZmKMFFFM
0
专业英语四级
相关试题推荐
WhatisTRUEaboutGeneralMladic?
Whatwasthepossiblereasonfortheshuttledisaster?
What’stheprobablerelationshipbetweenthetwospeakers?
TheGreenhouseEffectTogetabetterunderstandingofglobalwarming,/itisimportanttounderstandthegreenhouseeffect
Humanity’sprimaleffortstosystematizetheconceptsofsize,shapes,andnumberareusuallyregardedastheearliestmathemati
Themeditationbeginsinawaythatsurprisesmanypeople,becauseitstartsbycultivatinglovingfeelingtowardyourself.Yet
Therecanbenodoubtthatthecomputerrevolutionhastouched【C1】______everypersoninthecountry【C2】______somewayorother
WhileAmericancitiesaresynchronizinggreenlightstoimprovetrafficflowandofferingapplicationstohelpdriversfindpark
Fromthehealthpointofviewwearelivinginamarvellousage.Weareimmunizedfrombirthagainstmanyofthemostdangerous
Whyarethelivesofplantsnotwell-knowntomostpeople?
随机试题
垂体性Cushing病与异位ACTH综合征缓慢发展型的鉴别,正确的是
A、砂仁、豆蔻、鱼腥草B、西洋参、西红花、人参C、车前子、葶苈子、海金沙D、姜汁、梨汁、蜂蜜E、阿胶、鳖甲胶、鹿角胶需要另煎的一组药物是
A.James染色B.维多利亚蓝染色C.丽春红S染色D.PTAH染色E.MSB染色纤维蛋白
企业在进行租赁或购买设备决策时,需要考虑的主要因素包括( )。
背景材料:某城市的公路改建项目,业主为了控制工程造价,与设计方详细研究了各种成本控制措施,要求通过成本管理的各种手段,不断促进降低施工项目成本,尽可能地以最低的成本达到设计要求。施工方在面对业主提出的要求后也采取了一系列措施,选择适宜的施工方案,
下列关于民事诉讼中陪审制度的说法正确的是()
在()上,传统人事管理方法单一,以人工为主处理数据,而现代人力资源管理,更强调使用电脑技术处理信息资料,及时准确地提供决策依据。
敏敏每次做完题总是会一遍又一遍地检查,她自己也知道没必要,但却没办法控制自己。这说明敏敏可能患有()。
已知数a=2×3×5,数6=3×5×7那么a与b的最大公因数是()。
Comparedwiththedevelopedcountries,someAfricancountriesareleftfarbehindintermsofpeople’slivingstandard.
最新回复
(
0
)