简介：今天是新学期的第一天，但是老师并不快乐，因为她的学生忘了带铅笔、钢笔……快来一起唱这首“开学歌”吧!

简介：

简介：

简介：

简介：

简介：

简介：

简介：

简介：

简介：

简介：

简介：

简介：[1]这是一位长者对孩子谆谆善诱的教育，实际上是“I”第一人称在说话。Yes是开始说话的一种语气，翻译时可以省略。

简介：

简介：Background:Althoughemergingresearchisdemonstratingthepotentialhealthimpactofexergaming,investigationshaveprimarilybeenconductedinlaboratorysettingsamongsmallsampleswithshort-terminterventions.Informationontheeffectivenessofexergaminginunderservedchildren’sobjectivephysicalactivity(PA)inpopulation-basedsettingsisalsoscarce.Moreover,mostempiricalstudieshaveonlyincluded1typeofexergameintheintervention.Therefore,thisstudy’spurposewastoinvestigatethelong-termimpactofamultigameexergaminginterventionamongunderservedchildrenintegratedwithinschoolcurricula.Specifically,thisstudyexaminedtheeffectofexergamingonchildren’saccelerometer-determinedsedentarybehavior(SB),lightPA,moderate-to-vigorousPA(MVPA),andenergyexpenditure(EE)over2yearsascomparedwithregularphysicaleducation(PE)classes.Methods:Atotalof261second-andthird-gradechildren(134girls,127boys;meanage8.27years)wererecruitedfrom2Texaselementaryschools.Children’spre-test3-daySB,lightPA,MVPA,andEEatschoolwereassessedinthefallof2012.Participantswereassignedto1of2groups:(1)exergaming/PEgroup(125minweeklyofexergaming-basedPAprogram)and(2)comparisongroup(125minweeklyofPE).PA(SB,lightPA,andMVPA)andEEoutcomevariableswereassessedagainin2013(post-test)and2014(follow-up).Results:SignificanttimeeffectswereobservedforSB(F(1,162)=25.0,p<0.01,η~2=0.14),lightPA(F(1,162)=9.6,p<0.01,η~2=0.06),andMVPA(F(1,162)=6.2,p=0.01,η~2=0.04)butnotforEE(F(1,162)=0.63,p>0.05,η~2=0.004).Subsequentpairwisecomparisonsrevealedsignificantincreasesfrompre-topost-testforlightPA(p<0.01),MVPA(p<0.01),andEE(p=0.02)withnochangesinSB(p>0.05).Conversely,significantdecreasesoccurredinlightPA(p<0.01)frompost-testtofollow-upwithnodifferencesseeninMVPA(p=0.08)andEE(p=0.06)overthesametimeperiod.Asignificantincreasewasseen,however,forSBfrompost-testtofollow-up.Conclusion:Exergami

简介：

简介：

简介：Tom,a15-year--oldboy,wasastudentatahighschoolinOhio.Hewasnotagoodstudent.Hedidnotbehaveatschool.Hetalkedinclass,andhewasoftenlate.Histeacherstoldhim,"Gototheprincipal'soffice."

简介：

简介：哎呀，终于开学啦！我发现我其实还是很喜欢上学的。因为在学校里有我的好哥们和同学。