Dogsandotherhairymammalsshakeatjusttherightfrequenciestogetridofwatermostquicklyfromtheirbodies-anddirectlyontoanyunluckyhumansnearby．Micedoit．Sodotigersandpandas．Theseanimalsreallyknowhowtoshake．Frequencyisthenumberofcycles-movementsbackandforth-persecond．

ResearchersattheGeorgiaInstituteofTechnologyinAtlantarecentlyrecordedvideosof40differentanimals，standingfor15differentspecies．Thescientistswantedtoseehowwet，hairymammalsshakeoffwateraftertheygetwet．Thescientistssaytheanimalsshakeatjusttherightfrequenciestolosewaterdropsasquicklyaspossible．"Ithinkit'sprettyamazingthattheycandothat，"DavidHu，oneofthescientists，said．

ThisstudywasledbyAndrewDickerson，agraduatestudentinHu'slab．Histeamcallsthisget-dryshake"nature'sanalogy（类似） tothespincycleofawashingmachine"．Boththewashingmachineandshakinganimalscangetridofwaterquickly-butanimalsaremuchfasterthanwashingmachines．Foranimals，thisprocesshelpsthemcontrolheatintheirbodies．

"Ifadogcouldn'tdryitself，itwouldhavetouse25percentofitsdailycaloriestoheatitsbodytogetridofthewater，"Husaid．"Everytimetheygotwettheywouldget hypothermia anddie．"

Thebiggertheanimal，thesloweritshakes，accordingtoDickersonandhisteam．Amousemovesitsbodybackandforth27timespersecond，butabearshakesonlyfourtimespersecond．

Animals'skinalsohelpsthemgetridofwater．Thescientistsarecontinuingtolookathowanimalsinteractwithwaterinthenaturalworld．Inparticular，thescientistswanttoknowhowwaterinteractswithhair-whichmeansstudyinganimalsthathavegotusedtolifeinthewater，likebeaversandotters．

24．Whichofthefollowinganimalsisnotlikelytobestudiedintheexperiments？___

A．Apanda．B．Atiger．C．Acat．D．Asnake．

25．Whatcanwelearnfromthepassage？___

A．ProfessorDavidHuledthestudy．

B．Adogshakesoffwateratahigherspeedthanawashingmachine．

C．Animalsshakeoffwatertokeepthemselvescool．

D．Adogshakesoffwaterfasterthanamouse．

26．HowdidDavidHufeelaboutt