(1/2)ҳ
ˣˣ
βIJƵʲߣ൱ҲdzأٶֵȻÿһڵ϶һdzϵС͵
ǾЩЩվȵĸо
ע㣬רβ˳һλİȫ롣
һӷףжͱϾǶһֱ߱ܵٶҪˡ
ƾݵƣͣؼתı뷽ǽּ洦ɼϰıǰ·ߡ
һͷعٶ֣ȫٱľԣʱı䷽ɲʲô¡
תʮȵܶҪܳףǿ֤ˤЩʯ֮ϰԱܿԲֱܲӵͷײȥ
ʷһֱֵ߲ܽܽĵľûüǰܳԶ䣡һ졣
ȫβͷһDZ㽫ǽľУشֵľһߣԽʵͷȻǰʮԶĵϡ
һĻðæıԣЩβԶǰʯϰ谭жΪԸƵǶȵתʹβתԴάľ롣
Ȼԩ·Ϊս˳İȫҲDZġ
һһӣػβ˲һͻȻеƵĽŲŻᡣ
ͷȥβȻѾͣ½ŲյһسĢѾľѱõľԴڿҧ
ðЩΡ
˵ºͲ˵裬£˵βΣնߵҪԭ֮һ
żƽԭͷ˵һˣһ춼δػ
ǰһžͰ֮ǰŭɢƵģŤͷͽʳԶȥˡ
Ҫ˵β˾ٻ֣ӣҪβȥʵսɱ
βְ·ͻȻͲ˵ȷʵǵļƻ֮С
֮£ֻͣ½Ųת½ӽԷ
ڴڿʳľβ˵ĽӽʳĶΪ֮һ٣ֱ̧ͷ
ǷΪ˼άĴжϣ϶ǰСﲻԼвķѱ㣬ѡͣ½Ųʳ
ɲѾָƽ
ں˿ڻڳʹһʱҲףҲĺȱЩʲôйŭ
βǿ³İʾټһѻ
ȡǵ죬̶ĵ̼β˦ͷͺͬʱ˦ֳβֲһöȾɫ
һϵеľٶβϨ
(1/2)ҳ,һҳĶ
ǩĶ