ʧҵԱʧҵǰڵλͱ˰շۼƽɷʱ1겻5,ȡʧҵսΪ12;
2.ۼƽɷʱ5겻10,ȡʧҵսΪ18;ۼƽɷʱ10ϵ,ȡʧҵսΪ24¡
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1λɣй̶λģ˵λҪҪΪԱְ籣оͰʧҵշѵĽɡʧҵղαԼɷѵȶֱɹ˾ġ
2籣ɣûй̶λģĵԴ˾籣ɣַʽɵ籣ʧҵյģͬҪֱӰαԱֻҪʱ籣Ѹɡ
ʧҵǰʧҵշ
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