Haveyoueverwonderedwhydifferentanimalsorpestshavetheirp...
问题详情:
Have you ever wondered why different animals or pests have their particular colours? Colours in them seem to be used mainly to protect themselves.
Birds, especially seagulls, are very fond of locusts, but birds cannot easily catch locusts because locusts change their colours together with the change of the colour of crops.When crops are green, locusts look green.But when crops are ripe, locusts take on exactly the same brown colour as crops have.Some other pests with different colours from plants are usually easily found and eaten by their enemies.So they have to hide themselves in terror for lives and appear only at night.
If you study the animal life in any part of the world, you will find the main use of colouring is to protect themselves.Bears, wolves and other beasts move quietly through forests.They are usually invisible to the eyes of hunters, because they have the colour much like the barks of trees.
An even more strange act remains to be noticed.A kind of fish living in seas can send out a kind of very black liquid when it faces danger.While the liquid spreads over, its enemies cannot find it, and it immediately swims away.Thus, it has existed up to now though it is not powerful at all.
1.This passage mainly talks about ________.
A.the change of colour in locusts
B.the protective coloration of animals and pests
C.how a certain sea fish protects itself
D.animals or pests can dye themselves different colours
2.Locusts are ________ but they are not easily wiped out by their enemies because ________.
A.animals; they are powerful enough
B.beasts; they are dangerous to their enemies
C.pests; they take on the same colours as crops
D.birds; they fly extraordinarily fast
3.The pests that have different colours from plants usually appear at night because ________.
A.their enemies can easily find them and eat them
B.they have the habit of coming out in darkness
C.it’s easy for them to destroy plants in darkness
D.birds take their rest when night comes
4.Bears and wolves have the same colour as barks of trees because ________.
A.they fear other beasts
B.they like brown or grey colours
C.they enjoy walking through forests quietly
D.the colours help prevent themselves from being noticed
【回答】
BCAD
知识点:阅读理解
题型:未分类
-
对于一定量的理想气体,下列说法正确的是______。(选对一个给3分,选对两个给4分,选对3个给6分。每选错一...
问题详情:对于一定量的理想气体,下列说法正确的是______。(选对一个给3分,选对两个给4分,选对3个给6分。每选错一个扣3分,最低得分为0分) A.若气体的压强和体积都不变,其内能也一定不变 B.若气体的内能不变,其状态也一定不变 C.若气体的...
-
近日我州某地成功处置了一辆满载三*化*(PCI3)的车辆泄漏事故.三*化*是一种重要的无机盐工业产品,无*液体...
问题详情:近日我州某地成功处置了一辆满载三*化*(PCI3)的车辆泄漏事故.三*化*是一种重要的无机盐工业产品,无*液体、密度1.574g/cm3(21℃),熔点﹣112℃,沸点75.5℃,易燃.遇水反应生成亚**(H3PO3)和*化*,与有机物接触会着火.下列对三*化*的说法错误的是()A.三*化*中*元素的化合价为+...
-
根据句意及首字母,写出单词,使句子意思完整1.Mym________birthdayisDecember13t...
问题详情:根据句意及首字母,写出单词,使句子意思完整1.Mym________birthdayisDecember13th.2.Ilikep________music.3.Shew________toplaybaseball.4.Thelittleboywantssomec________.5.MissWangiso________musicteacher.6.Doyouwanttoplaywiththedogn________?7.Let'sp_...
-
下列各组词语中,没有错别字的一组是A.闲情逸致 声名鹊起 意气相投 金碧辉煌B.情随事迁 隐约...
问题详情:下列各组词语中,没有错别字的一组是A.闲情逸致 声名鹊起 意气相投 金碧辉煌B.情随事迁 隐约其辞 夸夸奇谈 前赴后继C.梦寐以求 百折不挠 闻过饰非 惨淡经营D.言简意赅 言近指远 伸张正义 良辰...
相关文章
- Theoddnessoflifeinspaceneverquitegoesaway.Herearesomeex...
- 语法填空Acouplehadbeenmarriedforover60years.Theysharedevery...
- Everytimewegetbehindthewheelofacar,weptourlivesandtheli...
- Theresultoftheexperimentwasverygood,
- Weallknowthat2016isconsideredtheyearofsuperheromovies....
- HaveyoueverwonderedwhetherthereislifeonMars?ThebigRedP...
- HaveyoueverwonderedwhetherwhereislifeonMars?ThebogRedP...
- Ihavethreegoodfriends.Welikesportsverymuch.Myfavorite(最...
- Althoughpeopleeverywhereseemtoenjoydrinkingcoffee,theyd...
- ---Thestudentslookverytiredafterthesportsmeeting.---We...