我们知道 ,数值方程表述的是物理量数值之间的关系。按国标的规定 ,在数值方程中 ,物理量的数值是用该量的符号括以花括号 ,并在花括号的右下角标上所用单位的符号表示的。例如{ｖ} ｋｍ/ｈ=3 6 {ｌ} ｍ/ {ｔ} ｓ 就是国标给出的标准形式。按这种表述形式 ,如果所采用的单位为? We know that the numerical equation describes the relationship between the values ​​of physical quantities. According to the national standard, in the numerical equation, the value of the physical quantity is enclosed in curly braces with the sign of the quantity, and the sign of the unit used in the lower right corner of the curly brackets. For example, {v} km / h = 3 6 {l} m / {t} s is the standard form given by the national standard. According to this formulation, if the unit used is?