赵伟家的客厅长6米，宽4.8米．计划在地面上铺方砖，要求都用

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赵伟家的客厅长6米，宽4.8米．计划在地面上铺方砖，要求都用整块的方砖，且恰好铺满．方砖的边长可以是（　　）

A．50厘米

B．60厘米

C．80厘米

D．100厘米

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