本帖最后由 Jem_B 于 2011-9-18 10:52 编辑
8 p; K( s1 l; Y+ L W) m$ k6 a& h L
1.this because the shape of earth is round.
: M6 |* e, R+ N# j% |2.two number add together in which orders are all riight.
5 ^# W& \0 d0 u; u. Q; V- M3 T1 X' A3.it's close to our observation.& Q, i) {* d( f3 J/ D6 F
4.the parctical direction is opposed to our imagination.
X& Z, D, l$ o, P* L5.two countries have long-stading differece with the boundary line.0 d1 j$ D7 v, F% [& @) f }( w
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