2006-07-13 17:36:02 =)
快!點進來‥
下瀉圖形中哪一組物體具有最大的萬有引力?
{A}
R
●---------●
2m 2m
{B}
R
●---------●
m m
{C}
R
●---------●
2m m
{D}
R
●---------●
3m 2m
{A}
R
●---------●
2m 2m
{B}
R
●---------●
m m
{C}
R
●---------●
2m m
{D}
R
●---------●
3m 2m