首页
登录
职称英语
[originaltext]We all scream for water when thirsty. But do you know in very hot
[originaltext]We all scream for water when thirsty. But do you know in very hot
游客
2024-04-06
1
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 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 noises10,000 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 insects 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 9 to 11 are based on the passage you have just heard.
9. What do plants do when they are thirsty?
10. What plants do many insects tend to attack?
11. 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/3543842.html
相关试题推荐
[originaltext]Ifyou’recarefulenough,you’llfindthatitiscommonnowad
[originaltext]Ifyou’recarefulenough,you’llfindthatitiscommonnowad
[originaltext]InBritainthebiggestnumberofworkingforeignerscomesfro
[originaltext]Peter:(19)ThelawontaxisisveryinterestingandIknowinLon
[originaltext]Peter:(19)ThelawontaxisisveryinterestingandIknowinLon
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
[originaltext]Ababyspendsthefirstyearoflifelearningtolisten.(9)A
[originaltext]Ababyspendsthefirstyearoflifelearningtolisten.(9)A
[originaltext]W:Hi,Scott,haveyouheardaboutDianarecently?M:No,Ihave
随机试题
MESOLITHICCOMPLEXITYINSCANDINAVIA
文明的摇篮cradleofcivilization
反映运动强度的生理指标主要有( )。A.体重、身高 B.心率 C.基础代谢
下列哪种抗生素联合使用会导致抗生素毒性增加?()A.庆大霉素+卡那霉素 B.
2009年,某省全年粮食作物播种面积253.85万公顷,比上年增长1.5%
共享型领导指独立于组织正式的领导角色或层级结构,由组织内部成员主动参与的、一种自
简述现代企业人力资源管理各个历史发展阶段的特点。
心肌梗死后心绞痛是不稳定性心绞痛的一种,它是指 A.急性心肌梗死发生后1个月内
适合从事教育、咨询等方面的工作的职业兴趣类型是()。A.现实型 B.社会型
某行政办公大楼的初步设计深度不够,不能准确地计算工程量,但工程设计采用的技术比较
最新回复
(
0
)