卫星发射的最低速度是每秒7900米,每分钟多少米?合多少千米?/b;m9h3{6L3Z-S,~5q
算式:提示-\9i5?.c8W4c;q+r6]6K1Z/b;m9h3{6L3Z-S,~5q
答:每分钟4[,u/p8E.y米,合0U:z*\3{3D8~8D'j5o.e:m,z千米。/b;m9h3{6L3Z-S,~5q