首页
登录
职称英语
[originaltext] We all scream for water when thirsty. But do you know in very
[originaltext] We all scream for water when thirsty. But do you know in very
游客
2023-08-25
35
管理
问题
We all scream for water when thirsty. But do you know in very hot, dry weather, plants also make faint sounds as if they are crying out for help? You see, in a plant’s stem, there are 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 Wnter 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 more quiet than a whisper. Robert knows that healthy, well watered plants are quiet. 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 in sects may listen for the plants that cry. And then they may buzz in to kill. To test this 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 the insects to see if they attack more often than usual. If he 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.
Questions 16 to 18 are based on the passage you have just heard.
16. What do plants do when they are thirsty?
17. What plants do many insects tend to attack?
18. What could scientists do if Robert’s theory proves to be true?
选项
A、They could drive the insects away.
B、They could keep the plants well watered.
C、They could build devices to trap insects.
D、They could make the plants grow faster.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2956050.html
相关试题推荐
[originaltext]Manysaytheirbraindoesn’tstartworkingproperlyinthemo
[originaltext]M:Excuseme.Whoisinchargeofchanginghousingarrangementon
[originaltext]W:WhydidIgetstuckwithbuyinggiftsforourclientsthisyea
[originaltext]M:HowwasyourvacationinthecoldFebruary?Didyouspendmost
[originaltext]W:Whatbeautifulsnow!Thefirstsnowissoheavythatitmakes
[originaltext]M:Youaremycampaignmanager,Catherine.HowdoIconvincememb
[originaltext]M:Cannon-Englishmajorsattendseminarsandlecturesinallfou
[originaltext]Campmemorieslastforever!Wemakesuretheyareunforgettab
[originaltext]Campmemorieslastforever!Wemakesuretheyareunforgettab
[originaltext]Campmemorieslastforever!Wemakesuretheyareunforgettab
随机试题
AbortionShouldBeKeptOutoftheCriminalCodeA
HowtoDoBasicFirstAid1.Method1:PerformingthethreeCs■Checkthe【T1】_
Theincreaseinglobaltrademeansthatinternationalcompaniescannotaffor
[originaltext]M:Excuseme,Madam.Youarenotsupposedtobehere.Thisareai
A.1 B.2 C.3 D.4
视网膜震荡多表现为A.多伴有视网膜出血 B.多发生于后极部 C.中心视力下降
患者,男,55岁,因患牙周病拔除余留牙,三月后做全口义齿修复。二年后,患者常因说
药物与受体结合时采取的构象为A.扭曲构象 B.药效构象 C.最低能量构象
与银行借款相比,下列各项中,不属于发行债券筹资特点的是()。A.资本成本较高
根据支付结算法律制度的规定,关于基本存款账户的下列表述中,不正确的是()
最新回复
(
0
)