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һһٶߵľͿռ䣬װʮĸ¥
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۴ʲôǶ˵صIJֿ⣬˳ľ
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ֻ֪죬ͨ鳮ڤң֮;
籩ߵIJֿȻ;йءľԽȷˣ籩һ˾ܣ
;йصܣǿǴ˳ľĸ
һ籩ڣҲоôľҲɥʧˡ
籩߲ˣԳľ˵ͬǺϢ
Ϊһо֯ˣ˵ܵģӵ֯Ҳᱻdzľļأ
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ڵǴ͵ȥģ
ľգΪǡֿ⡱ĵգʮ¥ߣʮ
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һ£żöڵôҪϣһڵָȷڵķ䡣
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ʹѾȥ¥գǽƱػºۼ
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ľŹǻҺУ
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Сѻһѵʳհװࡢ߲ˡͷ
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֮⣬Աָһ䣬Ͱԡͷ˸ʪ롣
ճĵط˵ûµʱҾ顣ĿֲѾһƬˡ
ľŸɾֿ̨˿ɾ䣬ʵû뿪𣿡
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籩߾ȻùʹùѵǹȨ
˵Ŀʯʲôľƿ˴ĩҲûʲôʯйذ
ľӣѿʼ渵
ʵ籩ߴӺܾ֮ǰڿǶԿ졣ǹʵǺأԹûаЧ
籩߲˼Ƚļյóֻۣйɱ˹죡
ܶԸģΨй
ڷ籩˵ģϣһĿʯdz֮Ϊʯ
ֿʯ֮У̲Źǽʯĵȼ̲عĺΪABCDĸȼ
A̺70%Ĺ
AʯУһžӨĹ
ֿʯӲǰȡʱҪС̫ͷų
һBȻϺƷʵĿʯ̺50%Ĺ
BʯͼӲ˲٣һļҲ̫Ҳ顣
CֻͨĿʯ͵10%ҡ
ǵģûCͼתֱ¡
ֿʯϿȥӨ˸о⣬ͨʯͷѾû̫
CʯҲõĿʯ
ڵͼDѾѣֻʣ0.1%-0.001%ҡ
ֿʯרҵ̽˵ѾͨĿʯûʲô
ʷʫڵʱABĿʯѾ伣ˡCĿʯǹĴڡ
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ôĵգʵһľҡ
Dʯһɽһá
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γһǿľҲʷʫڵڵ
գɾڵͲļѹܴڿ
ǿĹڵǰʹǿĹҲмܡ
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