首页
登录
职称英语
What do plants do when they are thirsty? [br] [originaltext] We all scream
What do plants do when they are thirsty? [br] [originaltext] We all scream
游客
2024-10-23
9
管理
问题
What do plants do when they are thirsty? [br]
We all scream for water when thirsty. But do you know in very hot, dry weather plants also make faint sounds — as if they’re crying out for help?
You see, in a plant’s stem there’re 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 Winter 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 quieter 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 insects may listen for the plants that cry. And then they may buzz in to kill.
To test his 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 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.
选项
A、Quiet plants.
B、Well-watered plants.
C、Healthy plants.
D、Thirsty plants.
答案
D
解析
B 和D 的意思正好相反,故其中之一很可能是答案。由... many insects prefer attacking dry plants rather than healthy plants可知答案为D ,D 中的“Thirsty plants”是原文中由dry plants的同义转述。
转载请注明原文地址:https://tihaiku.com/zcyy/3814536.html
相关试题推荐
WhatdidtheprotestorsdotosupportAlfredoReinado?[br][originaltext]
WhatdidtheprotestorsdotosupportAlfredoReinado?[br][originaltext]
Whatdoesthespeakersayabouttheocean’slevelofsaltiness?[originaltext]
Whatisthemaintopicofthisconversation?[br][originaltext]M:Weseemtob
Whatisthemaintopicofthisconversation?[originaltext]M:Weseemtobehavi
Japan’sdemandforimportslastmonth[br][originaltext]Japan’stradesur
Japan’sdemandforimportslastmonth[originaltext]Japan’stradesurplusj
HowmanyMcDonald’srestaurantsnowofferspecialtydrinks?[br][originaltext]
Whatcanweinferfromthisnewsitem?[br][originaltext]TheNewYorkPhi
What’sthetopicdiscussedinthispassage?[br][originaltext]Whydowecr
随机试题
WhydoestheFoundationconcentrateitssupportonbasicratherthanapplied
Itispossibletolearnsomethingaboutmusicthroughbriefcontactwithit,
Previousstudieshaveshownthatparentswhoeatmorefastfoodandspen
对在合同约定的效益分享期内发生的期间费用划分不清的,应合理进行分摊,期间费用的分
中凹卧位需将床头及床尾抬起的角度分别为A.5°~10°,20°~30° B.1
属于抗病毒药的是()。A.诺氟沙星 B.吡哌酸 C.萘啶酸 D.阿昔洛韦
关于交感神经型颈椎病的临床表现与哪项无关A.视物模糊B.头痛C.出汗异常D.耳鸣
2020年,全年货物进出口总额321557亿元,比上年增长1.9%。其中,出口1
复制法的目的是A.增强疗效 B.改变药性 C.便于粉碎 D.降低或消除药物
长延时脱扣器用作电动机过载保护时,其整定电流应接近但不小于电动机的额定电流,且在
最新回复
(
0
)