2
ĵ㲻йŽƽ沼ֵķʽB AԵ彨ͥԺ BΪ彨 CͥԺɽȺ DȺ彨 3
йŽ͵ĻṹʽĸأC Aݶ B Cǽ D̨ 4
ľṹĹ췽îṹ ȷ𰸣 5
йĽͱ仯ʽḻ ȷ𰸣
Žͺͷģ 1
ĸ治ֳܹŽƺִƵIJ֮ͬD
Aƽ沼 B Cƹ淶 D 2
͵ĹŽܹɲ֣A A B C D 3
ĵֳܹй͵ԺȤζԣC A B彨 C
Dݶʽ仯 4
֣Žƽ沼DzɵģһҪ߶ԳƵķʽȷ𰸣 5
Žƺִһģûʲô𡣣
ȷ𰸣
Žƽƣһ 1
ִᣬŴŻҪԭǣA Aˮƽ BľʹȻ Cʩȫ D滮 2
ĶʦīƵƣAҽԺ Bѧ CϾŮӴѧ Dйѧ 3
ŽеIJָC Aֻѡľͷ Bֻѡʯͷ
CݹŽķҪѡ DҪ 4
D ƽŽʱʹòܵƵġ ȷ𰸣 5
еIJ淶ĹŴ䣬Ӧֵʹִ֮Ľ淶Ҫ ȷ𰸣
Žƽƣ 1
ʲô˵Ľõſ䣿D Aƽ B C Dʵ 2
һ²ǼĽC Aһ B C D˿ 3
йŴвͬĿռ仮ַĸУA
B