来自李敏强的问题
【单位换算:3m=______mm=______um300mm=________m=_______km4.6×10的六次方nm=______mm=______m20km=_________________=_______m5.6×10的6次方m=____________________________=______nm300cm=___________________=________um】
单位换算:3m=______mm=______um300mm=________m=_______km4.6×10的六次方nm=______mm=______m
20km=_________________=_______m
5.6×10的6次方m=____________________________=______nm
300cm=___________________=________um
1回答
2020-05-24 11:29