假如地球失去引力
0 w. m7 w j8 i. ~( F! u( C1 X# s& W3 h" v
$ m" F- ^) j/ z+ x4 P+ J7 j
- X# C) a4 B/ C5 M " [2 k8 A3 [& v" O0 V' Q
& V6 B8 h+ B+ K8 ^6 Q! ]0 ~
5 y3 h1 o0 }( Z# u- f: R* Y 4 y. F# D" l5 s( ^2 r+ |" S
1 l' z6 Y: v. H; T/ I V0 T* |
3 `( n" s/ L5 _. [* Z
. V8 X6 C% i3 i( g0 Q  " Y4 a0 M, R- w1 H# P7 W7 y4 M# P
9 H6 _) @' n+ u; e
( _; W! q8 n4 g: S7 S0 h3 p8 N |
發表於 2007-3-12 15:43:49
發表於 2007-3-12 16:20:47
發表於 2007-3-16 13:55:01