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、They could drive the insects away. B、They could keep the plants well-watered. C、They could make the plants grow faster. D、They
A、They could drive the insects away. B、They could keep the plants well-watered. C、They could make the plants grow faster. D、They
admin
2014-11-27
54
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、They could drive the insects away.
B、They could keep the plants well-watered.
C、They could make the plants grow faster.
D、They could build devices to trap insects.
答案
D
解析
信息明示题。根据短文最后两句可知如果Robert Winter的理论是正确的话,那么科学家就可以利用这个特点来发明可以捕昆虫的装置。故选项D正确。
转载请注明原文地址:https://kaotiyun.com/show/s0v7777K
0
大学英语四级
相关试题推荐
A、Itfailstoconsiderright-handedpeople.B、Itwoksbetterwithmenthanwithwomen.C、Itisdifferentformen’sclothingand
Americanuniversitiesarerushingtowardsawirelessfuture.Theyareinstallingnetworksthatletstudentsandteacherssurfth
A、OnOctober2.B、OnOctober8.C、OnOctober20.D、OnOctober21.D结合女士所说的Sorry,Sir.They’rebookeduponthe20th.Butwestillh
A、Sixtimes.B、Fivetimes.C、Threetimes.D、Twotimes.B选项表明,本题考查倍数或次数。短文中提到,声音在水中传播的速度是在空气中传播速度的5倍,故答案为B)。数字处为常考点,是听音重点。
精卫填海“精卫填海”是中国的一个神话故事。根据古代作品《山海经》的记载,太阳神最小最疼爱的女儿名叫女娃。有一天,女娃划着一只小船独自向东海太阳升起的地方去。不幸的是,海风来了,山似的波涛掀翻了小船。女娃的生命葬送在无情的大海里。她死后变成一只有红
Smokingisharmfultoourhealthandisextremelyhazardoustochildren.Parentswhosmokeoftenopenawindoworturnonafan
Troubledbythepersistentlypoorgraduationratesofbasketballandfootballplayers,theNationalCollegiateAthleticAssociat
It’stemptingtospendslowworkdaysthisholidayseasonshoppingforgiftsonline,butemployeesshouldthinktwice.Inarece
A、Humanbeingssuddenlyappearbeforethem.B、Someunexpectedanimalsstepintothebush.C、Thereareloudnoisescomingfromma
Youprobablyhavenoticedthatpeopleexpresssimilarideasindifferentways【B1】______thesituationtheyarein.Thisisveryn
随机试题
结直肠癌的病理类型分为________、________、________。
以下哪项可诊断妊娠合并心脏病
渗沟均应设置()
加强合同管理的实施要点有()。
某普通合伙企业2011年成立,张某于2012年提出入伙,如果原合伙协议没有相关的约定,下列表述不正确的是()。
—What’sinthe______?—Therearesome______and______inthem.
下列观点中,属于社会中心课程理论的有()。
某乡人民政府为解决乡机关干部及附近群众饮用水的困难,作出了《关于筹集资金安装自来水管道的决定》。其主要内容是:乡政府所在地的企事业单位每家交纳500元,所有工作人员每人交纳50元,乡政府所在地的甲、乙两村每户交纳40元,作为安装自来水管道的建设资金。甲村个
TheAmericanneedtoownthingsispartlytheresultofmassadvertising,【C1】______urgesconsumerstodiscardlastyear’scaro
A、Hisfirstapplicationwillnotbere-evaluated.B、Hewillhavetore-applythefollowingyear.C、Hisfamily’sfinancialcondit
最新回复
(
0
)