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• Therearesomanydifferentplasticcardsthatadultshavetocarr...

• 问题详情：Therearesomanydifferentplasticcardsthatadultshavetocarryaround—librarycards,savingscardsfordifferentbanks,creditcards,justtonameafew...Sowhynothaveonetoreplacethemall?ScottBarnhill,an1l-year-oldfifth-gradestudentintheUS,hascomeupwithanideafo...
• 2020-04-0420906