首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Quiet plants. B、Well-watered plants. C、Healthy plants. D、Thirsty plants. D信息明示题。短文第二段指出He also knows that many insects prefer
A、Quiet plants. B、Well-watered plants. C、Healthy plants. D、Thirsty plants. D信息明示题。短文第二段指出He also knows that many insects prefer
admin
2014-11-27
44
问题
We all scream for water when thirsty. But do you know that 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 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 noises ten thousand 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 that 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 that 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、Quiet plants.
B、Well-watered plants.
C、Healthy plants.
D、Thirsty plants.
答案
D
解析
信息明示题。短文第二段指出He also knows that many insects prefer attacking dry plants rather than healthyplants.由此可知很多昆虫喜欢攻击处于干旱状态的植物。故选D。
转载请注明原文地址:https://jikaoti.com/ti/To9FFFFM
0
大学英语四级
相关试题推荐
A、Theotherteachersshouldbeconsulted.B、They’dhavetogetpermission.C、Shethinksitmightwork.D、Jackwouldn’tlikeit.
A、Thehamburgersweredelicious.B、Tedatetoomanyhamburgers.C、Pigslovehamburgerstoo.D、Tedlooksoverweight.B对话中男孩提到Iat
A、Inthedepartmentstore.B、Inthecleaner’s.C、Inahardwareshop.D、Inasnackbar.B由对话中男士提到的slacks,skirt和overcoat,以及女士提到的sh
DetailsDetermineSuccessForthispart,youareallowed30minutestowriteashortessayentitledDetailsDetermineSuccessby
Troubledbythepersistentlypoorgraduationratesofbasketballandfootballplayers,theNationalCollegiateAthleticAssociat
ImaginebeingaslaveinancientRome.Nowrememberbeingone.Thesecondtask,unlikethefirst,iscrazy.If,asI’mguessing,
A、Positive.B、Negative.C、Neutral.D、Disinterested.C观点态度题。本文是一般知识性的说明文,作者并没有使用任何带有强烈感情色彩的词语,客观地描述了事实,因此可知作者对吸烟的态度是中立的,故选C。
IspentMondaymorningataspeedawarenesscourse,whereasIhadbeendispatchedforfailingtonoticeaspeedcameraontheot
A、Shehasconfidenceinhim.B、Sheissurprisedatthenews.C、Shehasalsowonascholarship.D、Sheisn’tinterestedinthisne
随机试题
(2009年第46题)假膜性炎是发生于
根据《罂粟壳管理暂行规定》(1999年),中药饮片经营门市部零售罂粟壳,必须
高浓度葡萄糖、尿素或造影剂皆不影响的比重测定方法为
我国《环境保护法》的基本原则是( )。
一、注意事项1.《申论》考试,与传统作文考试不同,是对分析驾驭材料的能力与对表达能力并重的考试。2.作答参考时限:阅读资料40分钟,作答110分钟。3.仔细阅读给定的资料,然后按“申论要求”依次作答。二、给定资料1.200
A、 B、 C、 D、 C内部图形依次顺时针旋转90°并依次向右移动。
训练水平即指运动员在训练过程中达到的竞技能力的水平。()
人类在科学研究中掌握了电能的规律,然后以该规律为指导,人们研制生产出各种工业和家用电器,极大地促进了生产力的发展和人类生活品质的改善。这一事实表明()
A、B、C、D、B
Readthefollowingtextanddecidewhichanswerbestfitseachspace.Forquestions26-45,markoneletterA,B,CorDony
最新回复
(
0
)