ѡ
1𰸡ABC
ʲʹȷ̯
2𰸡CD
ʲĺ֧ʱļʲɱ뵱棻ʲʮ涨ʲ̯һӦ뵱棬ijʲľͨIJƷʲʵֵģ̯ӦʲijɱʲļֵӦȡõ̯ȡʲ¿ʼ̯¼ʲ²̯
3.𰸡ABCDE
ҵڲоĿε֧ͬʱģȷΪʲ
ɸʲʹܹʹûڼϾпԣ
ھɸʲʹû۵ͼ
ʲķʽܹ֤øʲIJƷгʲгʲڲʹõģӦ֤ԣ
㹻ļԴԴ֧֣ɸʲĿʹû۸ʲ
ݹڸʲε֧ܹɿؼDzɱϵʲ
4𰸡ABC
ʲָҵӵлƵûʵ̬ĿɱϷǻʲ(1)ʵ̬2ʲпɱԣ3ʲڷǻʲ
5.𰸡AB
CѡпȡõʲӦʱͷûDѡͶͶʲͶʺͬЭԼļֵͬЭԼļֵʵij⣩ΪʵʳɱEѡʲIJֵһΪ㣬еŵʲʹʱԸһļ۸ʲǴڻԾгͨгԵõʲʹʱIJֵϢҴĿǰʲʹʱгܴڵ£ʲԴڲֵ
6.𰸡AD
ҵѡʲ̯ӦӳʲйصľԤʵַʽɿȷԤʵַʽģӦֱ߷̯ʲӦȡõ̯ʹȷʲڳڼڲҪ̯Ҫÿһĩмֵԡաҵ8šʲֵĹ涨ҪֵģӦйصļֵʲIJֵһΪ㣬еŵʲʹʱԸһļ۸ʲǴڻԾгͨгԵõʲʹʱIJֵϢҴĿǰʲʹʱгܴڵ£ʲԴڲֵ
7.𰸡ABCD
ʲֵʲֵʲ֧ʱӦʲɱʲֵ̯ʲʲֵתʲȨʲֵ
8.𰸡BE
ʲĺ֧ʱļʲɱ뵱棻ʲָҵӵлƵûʵ̬ĿɱϷǻʲڲɱϵķǻʲҵͨȡõʹȨΪʲˣҵоε֧ȫû뵱棨ãε֧IJʱʱļ뵱棨о֧й鼯ĩתã
9𰸡BCE
ṩֽۿƷģ۷ܼ۷ȷӦծȨпɳȡõʲԭʱĿòתΪʲ˼ֵ