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
26
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
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
Whichwillreduceclimate-relatedriskandvulnerabilities?[br][originaltext]
Wernicke-Korsakoff综合征的描述错误的是A.主要表现为眼肌麻痹、
下列各项中,不是血虚证临床表现的是A.经少经闭 B.头晕眼花 C.心烦耳鸣
共用题干 第三篇EgyptFelledbyFamineEvenanci
小分子或离子分散,溶液澄明、稳定的是A.低分子溶液剂 B.高分子溶液剂 C.
患者男.56岁。因颅脑损伤急诊入院,护士评估患者后,确认患者存在以下健康问题,护
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性: A.如
牙槽脓肿切开引流的指征
货币的产生使商品内部的一系列矛盾转化为商品与货币的外部对立。这些矛盾不包括()
最新回复
(
0
)