1 计量单位我国的法定计量单位是以国际单位制(SI)为基础制定的,从1986年起实行。在使用法定计量单位时,应注意以下几个方面:(1)熟悉法定计量单位。注意单位的名称和符号与量的名称和符号的区别,不要把单位名称与量的名称、单位符号与量的符号混淆了。(2)正确使用词头。注意不要把词头符号与单位符号混淆了。书写时,词头与单位符号之间没有间隔,数值与单位符号之间空1/4格。(3)正确书写。量的符号一律用斜体;计量单位和词头的符号一律用正体。 1 units of measurement China’s legal unit of measurement is based on the International System of Units (SI) as the basis for the formulation, since 1986 into effect. In the use of legal units of measurement, should pay attention to the following aspects: (1) Familiar with legal units of measurement. Pay attention to the difference between the name of the unit and the name and symbol of the quantity, and do not confuse the name of the unit with the name of the quantity and the sign of the quantity of the unit. (2) the correct use of prefix. Be careful not to confuse the prefix symbol with the unit symbol. When writing, there is no space between the prefix and the unit symbol, and the space between the value and the unit symbol is 1/4. (3) correct writing. The symbols are always in italics; the units of measure and the symbols in the prefix are all orthodox.