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1、Exampleone:Certainlynocreatureintheseaisodderthanthecommonseacucumber.Alllivingcreature,especiallyhumanbeings,havetheirpeculiarities,buteverythingaboutthelittleseacucumberseemsunusual.Whatelsecanbesaidaboutabizarreanimalthat,Lineamongothereccentriciti
2、es,eatsmud,feedsalmostcontinuouslydayandnightbutcan(5)livewithouteatingforlongperiods,andcanbepoisonousbutisconsideredsupremelyediblebygourmets?Forsomefiftymillionyears,despiteallitseccentricities,theseacucumberhassubsistedonitsdietofmud.Itisadaptable
3、enoughtoliveattachedtorocksbyitstubefeet,underrocksinshallowwater,oronthesurfaceofmudflats.Commonincool(10)wateronbothAtlanticandPacificshores,ithastheabilitytosuckupmudorsandanddigestwhatevernutrientsarepresent.Seacucumberscomeinavarietyofcolors,rang
4、ingfromblacktoreddish-browntosand-colorandnearlywhite.Oneformevenhasvividpurpletentacles.Usuallythecreaturesarecucumber-shaped-hencetheirname-andbecausetheyaretypically(15)rockinhabitants,thisshape,combinedwithflexibility,enablesthemtosqueezeintocrevi
5、ceswheretheyaresafefrompredatorsandoceancurrents.Althoughtheyhavevoraciousappetites,eatingdayandnight,seacucumbershavethecapacitytobecomequiescentandliveatalowmetabolicrate-feedingsparinglyornotatallforlongperiods,sothatthemarineorganismsthatprovideth
6、eirfoodhave(20)achancetomultiply.Ifitwerenotforthisfaculty,theywoulddevourallthefoodavailableinashorttimeandwouldprobablystarvethemselvesoutofexistence.Butthemostspectacularthingabouttheseacucumberisthewayitdefendsitself.Itsmajorenemiesarefishandcrabs
7、,whenattacked,itsquirtsallitsinternalorgansintothewater.Italsocastsoffattachedstructuressuchastentacles.Theseacucumber(25)willeviscerateandregenerateitselfifitisattackedoreventouched;itwilldothesameifthesurroundingwatertemperatureistoohighorifthewater
8、becomestoopolluted.8.Whatdoesthepassagemainlydiscuss?(A)Thereasonfortheseacucumber'sname(B)Whatmakestheseacucumberunusual(C)Howtoidentifytheseacucumber(D)Placeswheretheseacucumbercanbefound9.Inline3,theword"bizarre"isclosestinmeaningto(A)odd(B
