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
2023-08-24
39
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:http://tihaiku.com/zcyy/2953024.html
相关试题推荐
[originaltext]W:John,doyouliketogoswimmingatthepoolwithmetoday?I’
[originaltext]W:John,doyouliketogoswimmingatthepoolwithmetoday?I’
[originaltext]W:John,doyouliketogoswimmingatthepoolwithmetoday?I’
[originaltext]W:John,doyouliketogoswimmingatthepoolwithmetoday?I’
[originaltext]M:Hi,Ann,welcomeback.How’syourtriptotheStates?W:Very
[originaltext]M:Hi,Ann,welcomeback.How’syourtriptotheStates?W:Very
[originaltext]M:Hi,Ann,welcomeback.How’syourtriptotheStates?W:Very
[originaltext]M:Lasttimewetalkedaboutthehistoryofpaper,Butdoyoukno
[originaltext]W:Hi,Mike.I’mgoingtogiveapresentationonWinstonChurchil
[originaltext]W:Hi,Mike.I’mgoingtogiveapresentationonWinstonChurchil
随机试题
•ReadthearticlebelowaboutCoca-colaanditsadvertising.•Foreachquestion
ScientistshadthoughtpeoplebeganmanipulatingfiretocreatetoolsinEur
EnglishEssayAsthebeginningofaseriesoflectur
Aftertheyear1958.amoremodernSupremeCourtagreedwithJusticeHelen.I
当观察者看到榜样因采取某种行为而获得奖励时,观察者学习该榜样行为的可能性就增高,
在信息系统试运行阶段,系统失效将对业务造成影响。针对该风险,如果采取“接受”的方
足月顺产新生儿,出生体重3500g,24小时后查体,发现下列哪项情况是异常的A.
截至2011年底,浙江省社会组织吸纳社会各类人员就业人数约为:() A.2
下列关于城乡规划社会监督的表述中,正确的是()。A.在规划编制过程中,规划
在城市规划区内进行建筑物、构筑物、道路、管线和其他工程建设的,建设单位或者个人应
最新回复
(
0
)