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
32
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/2956049.html
相关试题推荐
[originaltext]Culturalcontrolsaretheoldestmethodsthathavebeenused
[originaltext]Culturalcontrolsaretheoldestmethodsthathavebeenused
[originaltext]BurningfallenleavesusedtobestandardpracticeacrossNor
[originaltext]BurningfallenleavesusedtobestandardpracticeacrossNor
[originaltext]Anelementaryschoolbusdriverpulledintoagasstationin
[originaltext]M:Hey,anyideaofwhattodothissummervacation?Theredoesn’
[originaltext]M:Hey,anyideaofwhattodothissummervacation?Theredoesn’
[originaltext]M:IneedaDVD-player,butIdon’tknowwheretobuytheminthi
[originaltext]M:IneedaDVD-player,butIdon’tknowwheretobuytheminthi
[originaltext]M:IneedaDVD-player,butIdon’tknowwheretobuytheminthi
随机试题
WhoisHenryBishop?[br][originaltext]Hello,IamHenryBishop.Astheed
Thejobofastudentaccommodationofficer______agreatmanyvisitstolandladie
Onthe20th【D1】______ofthefirstofficialreportonAIDStheheadoftheU
ManyChinesestudentswantto【T1】______theirMaster’sorPh.D.’sdegree
Pleaseturnonthelampsandthelight_
小儿何时尚不能站立、行走为立迟、行迟A.0~1岁 B.1~2岁 C.2~3岁
在PowerPoint中,要插入一个在每张幻灯片中都在相同位置显示的小图片,应进
偏相关分析的结果主要看相关系数和相伴概率,以下说法正确的是()。A.相关系数越
社会的货币化程度,是指( )。A.金融资产总额与实物资产总额的比重 B.
(2015年真题)中药二级保护品种的最低保护年限是( )A.30年 B.7年
最新回复
(
0
)