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 build devices to trap insects. D、Th
A、They could drive the insects away. B、They could keep the plants well watered. C、They could build devices to trap insects. D、Th
admin
2016-03-31
32
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://kaotiyun.com/show/jxL7777K
0
大学英语六级
相关试题推荐
Commonindoorplantsmayprovetobeavaluableweaponinthefightagainstrisinglevelsofindoorairpollution.Thoseplants
Commonindoorplantsmayprovetobeavaluableweaponinthefightagainstrisinglevelsofindoorairpollution.Thoseplants
DesigntheProspectivePatientRoomA)There’sverylittlethat’ssexyaboutthehealthcareindustry.Withinthetangledthrea
ForLondon-basedMichelleBrideau,10yearsinthetravelindustryfeltlikeaneternity.Whatstartedaslowpayandhighstres
StartupNuclearEnergyCompaniesAugurSafer,CheaperAtomicPowerA)Nothingcaptureshowfashionablethestartuphasbecomequi
SocialMediaandMarketingA)InMay2013,Ritz-CarltonHotelCo.boughtadstopromoteitsbrandpageonFacebook.Afterafewd
ItispossibleforstudentstoobtainadvanceddegreesinEnglishwhileknowinglittleornothingabouttraditionalscholarlyme
AfricanEconomicGrowthA)GoodnewsforAfrica,saytheexperts.Growthishealthyandbroad-based,fuelledinpartbyinfrastru
A、Interesting.B、Exciting.C、Exhausting.D、Boring.D注意短文中第二段指出在假期中Boris很快就觉得无聊了,这与选项(D)一致。
A、Leftherstaffasitis.B、Askherstafftoworkuntilitisfinished.C、Giveherstaffadeadline.D、Holdherstaffbackwith
随机试题
宏观社会经济环境的变化是推动组织变革的重要外部因素,下列属于宏观经济环境变化的有()
病人空腹血糖8.1mmol/L,空腹胰岛素31mU/L。该病人应考虑
某工程双代号网络计划如下图所示,其关键线路有()条。
根据企业破产法律制度的规定,对于债权人取得的附生效条件的债权,下列表述不正确的是()。
接上题。2×16年末,折现率仍为4%,则甲公司在2×16年末应确认的销售费用为()。
俗话说,“一双筷子容易折,十双筷子断就难”,你认为这说明了()。
3/10,7/20,(),1/2,1/2
第一次将“社会更加和谐”作为全面建设小康社会的重要奋斗目标是党的()
已知随机变量X服从参数为λ的指数分布,则概率
若要定义一个具有5个元素的整型数组,以下错误的定义语句是
最新回复
(
0
)