Ʋⷨ
÷Χ
----
Ϊλָ"ԵƲⷨ"е"Ʋⷨ"һƣǽ
ͲͬԵƲⷨר㰮飬ǿһĿǰڸ״̬""͵㷨

ڷ
1ϴƺ󣬰ȫƱ泯ϣ̯šע⣺ֳֵǶˣǸƺ
µһˣ
2ѡơ˳ͼʾŵ(1)(7)λá
3ƿ棬ʼ
            4
        3        5
     2               6
        1        7

λ
νǷָйռѧߴǣ̫ˮǡǡ¡ǡǺľǡ
߸ǷֱƹܵĲͬ򣬶ƾʹŲͬǡ
(1)¡ƹܵߵļ״ͥ
(2)ǡƹܵ˵ܡ״
(3)ǡƹܵ˵ܡ״
(4)̫̫ƹܵС
(5)ǡָʾߺֵľǱڵѡ
(6)ľǡľʵĻȡκ˼ʹϵʵĻá
(7)ˮǡˮƹóסҵѧϰ״

