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һ Ϊƶȼй򣬷ҼְԱĹ͹й涨⣬Ϥ֮ 
 
ڶ ְԱϵָõŮְԱԡ 
 
 ü 
 
 ҹְԱξ׼⣬ӦһȾãڼ30Ϊޣϸ¼á
 
 ְԱ֮һߣùã 
 
1.δ18ߡ 
 
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 ½ְԱ׼úӦڰ 
 
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 ְԱܳͷдְߣԽۡ 
 
  
 
 ְԱӦ湤ϧģӦְ֤ϵĻܡ 
 
ڰ ְԱʱΪȫղơ
 
 
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ھ ְԱĹʣ¸ƶȣÿ찴涨ʱϽ½ܲÿһζڷнˮɡδ1²豨ꡣ 
 
ʮ ΪӦҪְԱʱڲԭ룬ԭͶʱְԱþܾ빤ʱӦְԱͬ⡣ 
 
ʮһ ְԱʱߣӦ󣬷뿪λʱش¹ʣһίͬ¡ѻԵ籨绰֮ܡ  
 
  
 
ʮ ְԱĽΪ֣ 
 
1.ν涨ʱɹ涨񡣳İɽ㡣巽ʽӸ  
2.ɡ涨ⳬ񡣾巽ʽӸ 
 
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