【一道英语阅读理解题Doyouknowwhydifferen-查字典问答网

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　　【一道英语阅读理解题Doyouknowwhydifferentanimalsorinsects（昆虫）havetheirspecialcolors?Colorsareusedmainlytoprotectthemselves.Whycan’tsomebirdseasilycatchlocusts（蝗虫）?Itisbecauselocustschangetheircolor】

　　一道英语阅读理解题

　　Doyouknowwhydifferentanimalsorinsects（昆虫）havetheirspecialcolors?Colorsareusedmainlytoprotectthemselves.

　　Whycan’tsomebirdseasilycatchlocusts（蝗虫）?Itisbecauselocustschangetheircolorstogetherwiththechangeofthecolorsofcrops（庄稼）.Whencropsaregreen,locustslookgreen.Butasautumncomes,locustschangetothesamebrowncolorascropshave.Someotherinsectswithautumncomes,locustschangetothesamebrowncolorascropshave.Someotherinsectswithdifferentcolorsfromplantsareeasilyfoundandeatenbyothers.Sotheyhavetohidethemselvesforlivesinthedayandappearonlyatnight.

　　Ifyoustudytheanimallife,you’llfindthemainuseofcoloringistoprotectthemselves.Bears,lionsandotheranimalscan’tbeeasilyseenbyhunters（猎人）.Thisisbecausetheyhavethecolorsmuchlikethetrees.

　　Haveyouevernoticedanevenmorestrangething?Akindoffishintheseacansendoutblackliquid（液体）whenitfacesdanger.Whiletheliquidspreadsover（散开）,itsenemies（敌人）can’tfindit.Anditquicklyswimsaway.Soithasliveduptonowthoughitisnotstrongatall.

　　（）91.Fromthearticlewelearnthatlocusts__________.

　　A.aredangeroustotheirenemies

　　B.areeasilyfoundbybirds

　　C.changetheircolorstoprotectthemselves

　　D.aresmallanimals

　　（）92.Howcaninsectswithdifferentcolorsfromplantskeepoutofdanger?

　　A.Theyhavetomovequietly.

　　B.Theyhidethemselvesinthedayandappearatnight.

　　C.Theyhavethecolorsmuchliketheirenemies.

　　D.Theyrunawayquickly.

　　（）93.Bearsandlionscankeepsafebecause__________.

　　A.theyliveinforests