单位换算:(1)6.8×108nm=______m (2)6.5m/s=______km/h (3)1.5min=______s (4)7200s=_______h

问题描述:

单位换算:(1)6.8×108nm=______m (2)6.5m/s=______km/h (3)1.5min=______s (4)7200s=_______h

0.68 23.4 90 2