3参数与偏差范围的表示①数值范围号的使用应统一,一般使用波纹连接号“~”。例如:5至10可写成5~10;但5万至10万应写成5万~10万,不能写成5~10万。②幂次相同的参数范围:前一个参数的幂次不能省略。例如:3×109~5×109不能写成3~5×109,但可以写成(3~5)×109。 3 parameters and deviation of the range of representation ① The use of numerical range of numbers should be uniform, the general use of corrugated connection number “~ ”. For example: 5 to 10 can be written as 5 to 10; but 50,000 to 100,000 should be written 50,000 to 100,000, can not be written 5 to 10 million. ② the same power range of the parameters: the power of the previous parameter can not be omitted. For example: 3 × 109 ~ 5 × 109 can not write 3 ~ 5 × 109, but can be written as (3 ~ 5) × 109.