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
2024-04-24
5
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、Thirsty plants.
B、Well-watered plants.
C、Quiet plants.
D、Healthy plants.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3569287.html
相关试题推荐
[originaltext]Theworld’ssmartestadolescentsinmathematicsandsciencea
[originaltext]Theworld’ssmartestadolescentsinmathematicsandsciencea
[originaltext]Weallscreamforwaterwhenthirsty.Butdoyouknowinvery
[originaltext]Weallscreamforwaterwhenthirsty.Butdoyouknowinvery
[originaltext]W:Goodevening!Welcometoourprogram.OurguesttodayisMr.T
[originaltext]W:Goodevening!Welcometoourprogram.OurguesttodayisMr.T
[originaltext]W:Goodevening!Welcometoourprogram.OurguesttodayisMr.T
[originaltext]W:Andwhendidyoubeginthissortofwork?M:Let’sseenow...
[originaltext]W:Iamreallydiscouragedbythelackofprogressmystaffisma
[originaltext]W:Iamreallydiscouragedbythelackofprogressmystaffisma
随机试题
SunlightisagreatsourceofvitaminDinmostoftheworld.Yeta(an)【C1】
阅读以下说明,回答问题1至问题3,将解答填入答题纸对应的解答栏内。 【说明
支气管哮喘最基础的病变为A.真菌性慢性支气管炎 B.病毒性慢性支气管炎 C.
女,82岁,1周前摔倒后右髋疼痛,活动障碍,查体一般情况好,右髋部无瘀斑,右下肢
伦理学作为一门学科出现的标志是()A.《希波克拉底誓言》 B.帕茨瓦尔《
某混凝土试块强度值不满足规范要求,但经法定检测单位对混凝土实体强度经过法定检测后
下列选项中,只能由法人享有的民事权利是( )。 A.地役权 B.荣誉权
下列各项资产中,无论是否出现减值迹象,企业每年年末必须进行减值测试的有( )。
关于工程计量的方法,下列说法正确的是()。A.按照合同文件中规定的工程量予
下列道路基层中,属于柔性基层的有( )。A.级配碎石基层 B.级配砂砾基层
最新回复
(
0
)