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1、Exampleone:Certainlynocreatureintheseaisodderthanthecommonseacucumber.Alllivingcreature,especiallyhumanbeings,havetheirpeculiarities,buteverythingaboutthelittleseacucumberseemsunusual.Whatelsecanbesaidaboutabizarreanimalthat,Lineamongothereccentricities,eatsmud,feedsalmostcontinuouslyda
2、yandnightbutcan(5)livewithouteatingforlongperiods,andcanbepoisonousbutisconsideredsupremelyediblebygourmets?Forsomefiftymillionyears,despiteallitseccentricities,theseacucumberhassubsistedonitsdietofmud.Itisadaptableenoughtoliveattachedtorocksbyitstubefeet,underrocksinshallowwater,oronth
3、esurfaceofmudflats.Commonincool(10)wateronbothAtlanticandPacificshores,ithastheabilitytosuckupmudorsandanddigestwhatevernutrientsarepresent.Seacucumberscomeinavarietyofcolors,rangingfromblacktoreddish-browntosand-colorandnearlywhite.Oneformevenhasvividpurpletentacles.Usuallythecreatures
4、arecucumber-shaped-hencetheirname-andbecausetheyaretypically(15)rockinhabitants,thisshape,combinedwithflexibility,enablesthemtosqueezeintocreviceswheretheyaresafefrompredatorsandoceancurrents.Althoughtheyhavevoraciousappetites,eatingdayandnight,seacucumbershavethecapacitytobecomequiesce
5、ntandliveatalowmetabolicrate-feedingsparinglyornotatallforlongperiods,sothatthemarineorganismsthatprovidetheirfoodhave(20)achancetomultiply.Ifitwerenotforthisfaculty,theywoulddevourallthefoodavailableinashorttimeandwouldprobablystarvethemselvesoutofexistence.Butthemostspectacularthingab
6、outtheseacucumberisthewayitdefendsitself.Itsmajorenemiesarefishandcrabs,whenattacked,itsquirtsallitsinternalorgansintothewater.Italsocastsoffattachedstructuressuchastentacles.Theseacucumber(25)willeviscerateandregenerateitselfifitisattackedoreventouched;itwilldothesameifthesurroundingwa
7、tertemperatureistoohighorifthewaterbecomestoopolluted.8.Whatdoesthepassagemainlydiscuss?(A)Thereasonfortheseacucumber'sname(B)Whatmakestheseacucumberunusual(C)Howtoidentifytheseacucumber(D)Placeswheretheseacucumbercanbefound9.Inline3,theword"bizarre"isclosestinmeaningto(A)odd(B
