单位换算: (1)人头发的直径约为7×10-5m=______cm=______
题型:问答题
问题:
单位换算:
(1)人头发的直径约为7×10-5m=______cm=______nm;
(2)太阳的半径约为7×108m=______km;
(3)0.5h=______min=______s;
(4)3600s=______h=______min.
单位换算:
(1)人头发的直径约为7×10-5m=______cm=______nm;
(2)太阳的半径约为7×108m=______km;
(3)0.5h=______min=______s;
(4)3600s=______h=______min.