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ID:38860190
大小:12.00 KB
页数:4页
时间:2019-06-20
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1、Thebicycleisoneof____simplestusefulinventionsintheworld.Whatismostsurprisingisthatit_____notinventedearlier,althoughthepicturesforbicycleswas_____bythegreatinventorLeonardoDaVinci。Thosethingswere____produceduntillongafterhedied.Bicyclewasfirstinvented_____1791.Afterthat,itc
2、hangedalot. Apersonridingabicycleusesverylittleenergytomakethebicyclemove,andthereisnopollutionatallwhenyouare_______.Evenso,indeveloped____4___,mostpeopledon’ttraveltoworkby______.Itisnotbecausepeoplefeeltriediftheyridetowork,but______becauseitisdangeroustorideonthebusyro
3、ad.Todaymanycountrieshasbuiltpathonlyfor____inthepark.Perhapswecanbuildpathonlyforbicyclesontheroad,too.Ifwedothat,wecanusebicyclesinourdaily______.Ithinkitwillchangeourlivesandourworld.
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