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
48
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 extend their water pipes.
B、They give out faint cries.
C、They make noises to drive away insects.
D、They become elastic like rubber bands.
答案
B
解析
转载请注明原文地址:http://tihaiku.com/zcyy/2953022.html
相关试题推荐
[originaltext]Manyfactssuggestthatchildrenareoverweightandthesitua
[originaltext]Manyfactssuggestthatchildrenareoverweightandthesitua
[originaltext]Inthislesson,IwanttotalkaboutthehistoryofTheWhite
[originaltext]Inthislesson,IwanttotalkaboutthehistoryofTheWhite
[originaltext]ZoeChamberswasasuccessfulPR(PublicRelations)consultant
[originaltext]ZoeChamberswasasuccessfulPR(PublicRelations)consultant
[originaltext]M:Iwasyoungoncemyself,youknow.Iknowwhatit’sliketobe
[originaltext]M:Iwasyoungoncemyself,youknow.Iknowwhatit’sliketobe
[originaltext]M:Iwasyoungoncemyself,youknow.Iknowwhatit’sliketobe
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
随机试题
SHORTSTAYACCOMMODATIONFirstName:(1)CountryofOrigi
体质constitution
磺基水杨酸法测定尿蛋白,絮状浑浊,有大凝块下沉,可报告为A.± B.+ C.
图示为一牙源性肿瘤患者,生长缓慢逐渐增大可使颌骨膨大,下唇麻木,X线检查颌骨呈蜂
关于资产评估报告日,下列说法不正确的是( )。A.资产评估报告日是资产评估结论
Newresearchcontradictsacommondiett
患者,女,30岁,甲状腺功能亢进症病史半年。妊娠3个月后,甲状腺功能亢进症症状加
原发性支气管肺癌
常用的风险对策不包括()。A.风险集中B.风险控制C.风险转移D.风险自担
某县鞋厂工人陈某因长期接触鞋胶,身体出现多种不适,到该县医院就诊。因县医院条件有
最新回复
(
0
)