简介：便携式音乐播放器确实可以使我们享受美妙的音乐，但耳朵却要为此付出相当大的代价……

简介：本期给大家带来的是来自四川省青神县青神中学高10级（6）班的罗梦同学获得一等奖的作文，看看她是如何组句谋篇的吧。

简介：本期给大家带来的是来自四川省青神县青神中学高10级（6）班的罗梦同学的一等奖作文，看看她是如何组句谋篇的吧。

简介：本期给大家带来的是来自四川省青神县青神中学高10级（6）班的罗梦同学的一等奖作文，看看她是如何组句谋篇的吧。

简介：Manyofusbelievethataperson'smindbecomeslessactiveashegrowsolder.Butthisisnot.true,accordingtoDr.LissyF.Jarvik,professorofpsychiatry(精神病学)attheUniversityofCalifomia,LosAngeles,andaboardmemberoftheNewCenterforAgingattheVeteransHospital.Shehasstudiedthementalfunctioningofagingpersonforseveralyears.

简介：Ashopkeeperwhosellsgoodsformorethanwhathepaidforthemmakesaprofitonthetransaction.Ontheotherhand,onewhosellsgoodsforlessthanwhathepaidforthemmakesalossonthetransaction.Theprofit(orloss)madeonatransactionisoftenexpressedasapercentageofthecostprice(ie.thepricepaidbytheshopkeeperfortheitem).

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简介：目的:对现有的关于研究水合状态对运动员身体活动能力影响的证据进行批判性分析。方法:从多个数据库检索获取符合纳入标准的文献,随后采用唐斯和布莱克协议(DownsandBlackprotocol)对纳入文献进行批判性评估。结果:9篇文章符合入选标准,平均79%在方法论质量上代表高标准的研究。结论:证据表明在持续30s以上的活动中,脱水状态在身体表现中有消极作用:然而在少于15s的持续运动中,脱水状态对身体表现并无显著影响。

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简介：Comparedwithurbanfloods,dam-breakfloodsareassociatedwithgreateruncertainties,includingvariabledam-breakmodesandhydrologicalcharacteristics,soconventionalfloodestimationmethodscannotbedirectlyappliedintheestimationofdam-breakfloodloss.Inparticular,thereisscantinformationregardingtheconditionsofaffectedareaandhydrologicalcharacteristicsinsouthwestChina.Inthispaper,weintroduceanintegratedmodelforestimatingfloodlossthatisadaptedtothemountainousregionsofsouthwesternChinainlightoftherelativelackofavailableinformation.Thismodelhasthreemajorcomponents:abasicinformationmodel,adam-routedfloodpropagationsimulationmodel,andalossestimationmodel.Weestablishedthebasicinformationmodeldespitetherelativelackofavailableinformationusing3Stechnology[remotesensing(RS);geographicalinformationsystem(GIS);globalpositioningsystem(GPS)],dataminingtechnology,andstatisticalanalysistechniques.Ourdam-routedfloodpropagationsimulationmodelconsistsofmajorhydrologicprocessesandtheirgoverningequationsforflowpropagation,whichwesolveusingfinite-differenceschemes.Inthismodel,thefloodpropagationareaisdividedintogridsandeachgridisdeterminedbythecharacteristicparametersobtainedfromthepropagationsimulation.WepresentacasestudyoftheLianghekouhydropowerstationinSichuanProvince,Chinatoillustratethepracticalapplicationofthisintegratedmodelforlifelossestimation.