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- 问题详情：Greatinventionschangethewaywelive,Thefirstgreatinventionwasonethatisstillveryimportanttoday—thewheel.Thismade_ 61 easyformentocarryheavythingsandtotravellongdistances.For _62（century）afterthat,therewerefewinventionsthathadasmucheffectasthew...
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