英语专四考试阅读理解复习巩固试题2017年英语专四考试阅读理解复习巩固试题要不断的请教成功者，学习他们成功的方法。以下是小编为大家搜索整理的2017年英语专四考试阅读理解复习巩固试题，希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!Certainlynocreatureintheseaisodderthanthecommonseacucumber.Alllivingcreature，especiallyhumanbeings，havetheirpeculiarities，buteverythingaboutthelittleseacucumberseemsunusual.Whatelsecanbesaidaboutabizarreanimalthat，amongothereccentricities，eatsmud，feedsalmostcontinuouslydayandnightbutcanlivewithouteatingforlongperiods，andcanbepoisonousbutisconsideredsupremelyediblebygourmets?Forsomefiftymillionyears，despiteallitseccentricities，theseacucumberhassubsistedonitsdietofmud.Itisadaptableenoughtoliveattachedtorocksbyitstubefeet，underrocksinshallowwater，oronthesurfaceofmudflats.CommonincoolwateronbothAtlanticandPacificshores，ithastheabilitytosuckupmudorsandanddigestwhatevernutrientsarepresent.Seacucumberscomeinavarietyofcolors，rangingfromblacktoreddishbrowntosandcolorandnearlywhite.Oneformevenhasvividpurpletentacles.Usuallythecreaturesarecucumbershaped-hencetheirname-andbecausetheyaretypicallyrockinhabitants，thisshape，combinedwithflexibility，enablesthemtosqueezeintocreviceswheretheyaresafefrompredatorsandoceancurrents.Althoughtheyhavevoraciousappetites，eatingdayandnight，seacucumbershavethecapacitytobecomequiescentandliveatalowmetabolicrate-feedingsparinglyornotatallforlongperiods，sothatthemarineorganismsthatprovidetheirfoodhaveachancetomultiply.Ifitwerenotforthisfaculty，theywoulddevourallthefoodavailableinashorttimeandwouldprobablystarvethemselvesoutofexistence.Butthemostspectacularthingabouttheseacucumberisthewayitdefendsitself.Itsmajorenemiesarefishandcrabs，whenattacked，itsquirtsallitsinternalorgansintowater.Italsocastsoffattachedstructuressuchastentacles.Theseacucumberwilleviscerateandregenerateitselfifitisattackedoreventouched;itwilldothesameifthesurroundingwatertemperatureistoohighorifthewaterbecomestoopolluted.1.Accordingtothepassage，whyistheshapeofseacucumbersimportant??A.Ithelpsthemtodigesttheirfood.?B.Ithelpsthemtoprotectthemselvesfr