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75米的20%是多少米多
更新时间: 2020-11-04 00:00:00  

75米的20%是15米,75×20%=15(米)。“米”(metre),国际单位制基本长度单位,符号为m。“米”的定义起源于法国。1米的长度最初定义为通过巴黎的子午线上从地球赤道到北极点的距离的千万分之一,并与随后确定了国际米原器。随着人们对计量学认识的加深,米的长度的定义几经修改。

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