125CM,= M= MM= NM

题目

125CM,= M= MM= NM
0.25KM= M= 微米
1.25H= MIN
9000S= MIN= H

答案

[1]125CM=1.25M=1250MM =1250000000NM
[2] 0.25KM=250M=250000000 微米 ;
[3]1.25*60MIN=75MIN;
[4]9000S/60S=150 MIN/60MIN=2.5H