Moderninventionshavespeededuppeople’slivesamazingly.Mot...
问题详情：Moderninventionshavespeededuppeople’slivesamazingly.Motor-carscoverahundredmilesinlittlemorethananhour.Aircraftcrosstheworldaday,whilecomputersoperateatlightningspeed.Indeed,thisloveofspeedse...