ڰ˽ ݺġŰ

һ ɨĴʥݣת飺ˡġǺƽģƽ㷢ΰеôѽһ˵ʥݺֻһ飺Ǻƽġʱ䡣4
߶ صµĴصʥˣʥ˵հҪˡģΩģģڸġ˭ˡ˭ӵء2
 صĴĶ¶յˣ˵¶ո¶ҵȥ˵ʥʱΩһ޻飬ȨУ̹УܵġֻҪ㹩ûӣֻҪӣûܶ͡ȨߵȨƶô4
 ŷ־յĶӿ˶Ĵ˭ݺ޴ʣ˭Ͳʧÿݺʮ徻ǣʮ̴ǡʮı޴ǡ2
 յĴһǨʿȥʥ˵һЩеǶƷλܡʥ˵ôأ˵Ǯһݣһիܳɢȴܣͷūȴܡʥ˵ҽ̸һ¿ƾǼ¿ܸŵˣ
Խˣֻкǵȵ˲ܺǲܹǣ˵ðɣʹ߰ʥ˵ÿݺ󡯣ʮ顣˵һƶǨʿȥʥ˵ЩǮĽ̰ǣǾǣʥ˵ˡ4 
 һ˵޴ʣΩһûл飬ȨУ̹Уܵġ
 һ˵ҪʮΣʮΣʮĴΣΩʮΡ
߰ һ˵ÿݺ徻ʮ飬̴ʮ飬޴ʮ飬һǾʮű顣ȫһٱΩһ޻飬ȨУ̹Уܵġ˭˭纣ϵĸĭء£
߾ ˹ĴʥʥҮʱݣȥʱݡʥ˵Զְݰ˵ǵġʥ˵ľ仰ÿ飬⼸仰ȥһ£һعĿϲãıĽԼԴ֮ࡣ4
0 򡲮Ķ¶ȵĴʥסҵ˵¶ѽģǷǳϲģ㣬¶ѽÿݺҪңҼ㣬л㣬ܺõΪ񡣡¶ȣǧ򲻿ɿϡ2
һ ܶĶŷݵĴʥÿݺҪ£һһģ3
˶ ȶĴʥһ˵ڰʲô˵ʣ԰㱣Ҳ¶ȵ֮ʡʥ˵԰Χ૵еš2
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ݣӡŰʾʼգйջЩ˲ӡŰǲõġڰݺʣԼѡǰߵʥѵ֮ùҲһ䲻

