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 extend their water pipes. B、They give out faint cries. C、They make noises to drive away insects. D、They become elastic li
A、They extend their water pipes. B、They give out faint cries. C、They make noises to drive away insects. D、They become elastic li
admin
2018-09-15
31
问题
We all scream for water when thirsty. [9]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 noises 10,000 times more quiet than a whisper. Robert knows that healthy, well-watered plants are quiet. [10]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. [11]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、They extend their water pipes.
B、They give out faint cries.
C、They make noises to drive away insects.
D、They become elastic like rubber bands.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/rPH7777K
0
大学英语六级
相关试题推荐
BargainbookshoppersmusthavebeenpleasedlookingatAmazon’sbestsellerlistthisweekend:Theonlinebooksellerhaddropped
ConradHiltonreallywantedtobeabanker.Instead,hesuccessfullychangedthe【C1】______purchaseofaTexaslow-endhotelinto
A、TheUnitedStatesCopyrightOfficecreatedit.B、Itdoesnotprotectartists’techniquesandprocedures.C、Ithasnotbeencha
UsingFacebookmakespeoplesadder,atleastaccordingtosomeresearch.Butjustwhatisitaboutthesocialnetworkthattakes
Technologycanmakeussmarterorstupider,andweneedtodevelopasetofprinciplestoguideoureverydaybehaviorandmakes
A、Itneedsnegotiationforbetterconditions.B、Itrequiresatleastathree-yearsuspension.C、Itcanbecomesimilartohumant
A、HewillspenditinEngland.B、Hewillstudyhistory.C、Heisgoingtoliveinthecountry.D、HeisgoingtolearnFrench.B推断
A、Itisalesson.B、Itisalimitation.C、Itisarisk.D、Itisachoice.D
A、TheclasshasbeenassignedtoreaditinEnglish.B、HewasabletoreaditinFrench.C、Heisn’tsureit’savailableinEng
A、Itisalesson.B、Itisalimitation.C、Itisarisk.D、Itisachoice.D
随机试题
《围城》给人留下真诚直率印象的人物是()
患者女性,28岁。近4d来出现低热、刺激性干咳,伴左侧胸痛。查体:双肺叩诊清音,双肺呼吸音正常,左肺下侧部可闻及胸膜摩擦音。考虑该患者为胸膜炎,确定少量胸腔积液下列哪种检查手段较敏感
下列属于栓剂水溶性基质的有()
根据《行政区域界线测绘规范》,界桩点的平面测量,宜采用卫星定位系统(GPS)定位测量、光电测距附合导线,光电测距支导线、测边测角交会等方法进行测定;当点位中误差小于或等于()m时,采用GPS定位测量。
组织单位工程施工组织设计交底的是()。
某企业在4年前花20000元购买一台设备,目前的账面价值为10000元,现在的市场价值仅为3000元。该企业在进行设备更新分析时,该设备产生的沉没成本是()元。
下列选项中属于优等生特点的是()。
请认真阅读下列材料,并按要求作答。问题:依据拟定的教学目标,设计导入环节并说明理由。
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、解决问题能力、语言表达能力的测试。 2.作答参考时限:阅读材料40分钟,作答110分钟。 3.仔细阅读给定的资料,按照后面提出的“申论要求”依次作答。二、给定资料
某市举行大学生运动会。某大学有75名运动员参加此次运动会,且这些运动员分别来自该大学的8个系。如果来自中文系的运动员人数最多,来自新闻系的第二多,且比来自中文系的少一人,那么来自中文系的运动员最少有()名。
最新回复
(
0
)