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在国际单位制(SI制)中,有七个基本单位:米、千克、秒、安培、开尔文、摩尔、坎德拉,每个基本单位都有严格的规定,现介绍如下: 1 米米是长度单位,常用符号m表示。最初由法国在创建米制时提出,原规定为自北极通过巴黎到赤道的子午线长度的一千万分之一,并用铂铱合金制成米国际原器,存放于国际计量局。1960年第十一届国际计量大会改用米的原子标准,即规定1米为
There are seven basic units in the International System of Units (SI): meters, kilograms, seconds, amperes, kelvin, moore, candela. Every basic unit has strict rules and is described below: 1 meter is a unit of length , Commonly used symbols m said. Initially proposed by France at the time of creation of the metric system, the original rule was 1/10000 of the length of the meridian from the Arctic through Paris to the equator and was made of platinum-iridium alloy and stored in the International Bureau of Weights and Measures. The eleventh International Conference of Metrology in 1960 to use the atomic standard of rice, which provides 1 meter