һնƿռ
Ҷձʶǿһͬȼˣ̨ʹ꣬ӵǿ־ҲӵļᶨԻֶиĵֿ
ֻĵ֣ǰεĵ⣬һ½ڤ
УЩɭĹֵȫɢ
ҶյǰҲһ˲䣬ֻ˱֮УҲٴγǰ
㾹ȻôնҵĻСŴ֡漴һЦնҵĻΣ㲻֪ڤǿ࣬վ㻹Ҫ
ҶձԴŮмϧ֮ģ˼λᣬŮȻ飬ҪɱԼҶմ˿һҲûˣЦDz֪ҶijҪִݻˣ
Ҳ֪˾УΪûסԷȻ͵Ϯɱû뵽ҶվȻʵǿһٻͲòڤڣʹ֮Ϊʱڿռ䣡
һռIJ֮ǿҲΣգҶս˿ռҲ
ɣռңҼǿռ䣡ڤݣգ˫ֽڶ֮䣬ⷽСֵܵĻζУȻɷ⣬ԽԽСԿһڣУ
ڤȻǿȻһЩռ䷨ijΡ
źڤĿռ䷨кܴIJࡣǿпһռ䣬ܵı˪Ѹм伯У˪͵ӿ룬һ¾Ͱѻڱ˪֮У
Կң
ԿõϽڱ˪ѩ͵ãˣ
˲֪סı˪ǹؼؼڵĿռ䣡ռҶգ
ռȻڣҶȴǸεıֻǰӰʧˣֻʣҶһڿռ֮С
Ȼиһռ䡣Ҷյͷ漴ֵֻǺźⲢĿռ䷨ԣռֻܶʱڣҲ˵һʱ䣬ռͻȻұʱҲܺصˣ
㵹мʶ𣬴˿̿ռڣͺҶտһ˵˵ֻ߲֣ԡ
Ψһͬǣ̫ȫ棬Կơռȴͼ֣ܱȽϵһ
˵IJʱƣʱҲˡʱ֮ڣҿԽ㣡ֻҪɱ㣬ٷųռ䣬ҾͲһ˺
Ҷ㻹ʲôʱ䣬ɣ
Ҷ˫ĿһȴŶԷĹʵҶҲûеףռܸ˿ʱռ䷨ǿķΣˣ
ܿ죬ҶվЦˡ
һ նƿռ(1/2),һҳĶ