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ţƤѢһַŮ׵Ƥڽļӿ죬ͥҵ˫ѹٵѾһţƤѢţƤѢҪҽƣͬʱжעһʳƤҽԺ߽ţƤѢɲϣܹĶԴ

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Ҫ׺˽ţƤѢһƤֲͬƤƤסʪЩƤеǽӴԵģеǹԵģЩƤҲױҩơţƤѢƤǿŴģѪҺйϵģˣţƤѢȾƣһЩѪȵķͻţƤѢ֢״ءˣƤҽԺߴţƤѢ֢״ҪӣҪóڻ׼ڻڼ䣬ҪҪţƤѢơ

ƵЧӦֻкȡڸлĴС;ĴСڴллһֳΪȩжʣҪȩøⶾǣ(Ϸ)Լ1/3ȩøȱߣЩ˺ȾƱ;øȱݵǺȵ̫࣬ҲһΣ𺦽ij̶ȲڻһμԵ͸סˣݸȩøȱߣÿ60ȵİ׾Ʋ25(0.5)һɫơƾƲ50(1)ơƲ300

ȻǶкģҲǶţƤѢ֢״ܹصģо񫣬Ⱦ﷢ţܣٺһ㣬ǾҪȡţƤѢƵʱҪѭҽҪƤҽԺҽ

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