阅读理解。Doyouknowwhydifferentanim-查字典问答网
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  阅读理解。Doyouknowwhydifferentanimalsorpests(昆虫)havetheirspecialcolors?Colorsinthemseemtobeusedmainlytoprotectthemselves.Somebirdslikeeatinglocusts(蝗虫)butbirdscannoteasilycatc

  阅读理解。

  Doyouknowwhydifferentanimalsorpests(昆虫)havetheirspecialcolors?Colorsinthemseemtobe

  usedmainlytoprotectthemselves.

  Somebirdslikeeatinglocusts(蝗虫)butbirdscannoteasilycatchthem.Why?Itisbecauselocusts

  changetheircolorstogetherwiththechangeofthecolorsofcrops(庄稼).Whencropsaregreenlocustslook

  green.Butastheharvesttimecomeslocustschangetothesamebrowncolorascropshave.Someotherpests

  withdifferentcolorsfromplantsareeasilyfoundandeatenbyothers.Sotheyhavetohidethemselvesforlives

  andappearonlyatnight.

  Ifyoustudytheanimallifeyou'llfindthemainuseofcoloringistoprotectthemselves.Bearslionsand

  otheranimalsmovequietlythroughforests.Theycannotbeeasilyseenbyhunters(猎人).Thisisbecausethey

  havethecolorsmuchlikethetrees.Haveyouevernoticedanevenstrangeract?Akindoffishintheseacan

  sendoutakindofveryblackliquid(液体)whenitfacesdanger.Whiletheliquidspreadsover(散开)its

  enemies(敌人)cannotfindit.Anditimmediatelyswimsaway.Soithasliveduptonowthoughitisnotstrong

  atall.

  1.Fromthepassagewelearnthatlocusts________.

  [ ]

  A.aresmallanimals

  B.areeasilyfoundbybirds

  C.aredangeroustotheirenemies

  D.changetheircolorstoprotectthemselves

  2.Howcanpestswithdifferentcolorsfromplantskeepoutofdanger?

  [ ]

  A.Theyrunawayquickly

  B.Theyhavethecolorsmuchliketheirenemies

  C.Theyhidethemselvesbydayandappearatnight

  D.Theyhavetomovequietly

  3.Bearsandlionscankeepsafebecause_________.

  [ ]

  A.theyhavethecolorsmuchlikethetrees

  B.theymovequietly

  C.theylikebrownandgraycolors

  D.theyliveinforests

  4.Whycanthekindoffishliveuptonow?

  [ ]

  A.Becauseitisveryandstrong.

  B.Becausetheliquiditsendsoutcanhelpitescapefromitsenemies.

  C.Becausetheliquiditsendsoutcankillitsenemies.

  D.Becauseitswimsfasterthananyo

1回答
2020-05-24 09:15
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尚雨兰

  1-5D C A B C

2020-05-24 09:16:19

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