简介：在古老的中国，魏王心血来潮决定修建一座极高的塔，并将其命名为——通天塔。

简介：Purpose:Thepurposeofthisstudywastocompare4techniquesforarrivalatabaseaftersprintingmaximallytoreachit:slidinghead-first,slidingfeet-first,runningthroughthebasewithoutslowing,andstoppingonthebase.Asecondarypurposeofthestudywastodetermineanyadvantagetheremaybetodivingintofirstbasetoarrivesoonerthanrunningthroughthebase.Methods:Twohigh-definitionvideocameraswereusedtocapture3-dimensionalkinematicsofslidingtechniquesof9intercollegiatebaseballplayers.Anothervideocamerawasusedtotimerunsfromfirstbasetosecondin4counterbalancedconditions:runningthroughthebase,slidinghead-first,slidingfeet-first,andrunningtoastop.Mathematicalmodelingwasusedtosimulatedivingtofirstbasesuchthattheslidewouldbeginwhenthehandtouchesthebase.Results:Baseduponoverallresults,thequickestwaytothebaseisbyrunningthroughit,followedbyhead-first,feet-first,andrunningtoastop.Conclusion:Therewasanon-significanttrendtowardanadvantagefordivingintofirstbaseoverrunningthroughit,butmoreresearchisneeded,andeveniftheadvantageisreal,therisksofexecutingthistechniqueprobablyoutweightheminisculegain.

简介：Dongguan--oneSouthChinacityinGuang-dongProvince,ismakingeffortstoimproveitsindustrialbasebybringinginmoretalentedpeopleandresourcestoprepareforfierce(激烈的)inter-nationalcompetition.

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简介：【摘要】《义务教育英语标准》（2011版）明确规定了英语教学的主要目标是为了培养学生的英语核心素养，英语学习活动观是落实英语核心素养的重要途径。本文以英语学习活动观为指导，通过粤教版《开心学英语》六下Unit4 The Panda Base 阅读课教学例，从文本解读、教学目标制定和教学活动的设计与实施三个角度深入剖析英语学习活动观在小学高年级阅读教学中的实践，以实现学生英语核心素养的发展。