(1/2)ҳ
磬ʦдĹʮ룬ԭ֭ԭζİ汾õЩԶʹá
DZʮ롷ݸ˷ԡ
ɲһ飬dzϵ̬ȡ
ԽӹȥǾǴӦˡ
һ룬ֻ֣˫ֽӹȻЦ˵
ҾͲˡ
Цŵͷŷ˵
Ҿϲĺˬһ㲻ŤŤ
ԾϺѳϵĺͬݸ
϶ֻdzĿһۣȻͷóԼϸֱʣٵǩԼ֣ϰӡ
ͬһʽݣϺܿľȫǩã·ǸıƵġ
ǩ֮ԼһݣȻݵݸ˷ԣ˵
ҾԼ˰ɣ
ͷ˵
ȻˣҲĹɶ֮һˡ
ֻҪպͬϵ֮ԴȨҲϡ
Ӧ
ҪһDzƷ嵥DzøƷֻҪ嵥ͿˣһϵʿDZߵˣŷвչгƹ㡣
ʵ
㲻˵ֻʿгŷв㶼·
˵
DZвٵˣԶԣҲ֪Ǹʿʵгûģʿӵ¹ٰµ֧ʿǣ뷨ǹ֮䲻̫μг̿öණԹͨġ
ʱ˵
֪ŷDZ߶ҩƺͦİɣ
һû뵽ԾȻ˵ЩȻ˵ԶŷDZߵгġ
Ҳûд˵
ţȷʵЩݣDZ߸ҪڵҩƷͨٴʵͳɷַҩɷָӣṩҩݡ
䡢ѿʼҩǦ麬5ppmҩļӹƣֳܻ
˵
ŷҽѧ罫ҩΪҽѧΪȱѭ֤ҽѧݣͱӢ1976ġҽƷҩΪҩʹá
Щ֮ǰʲǿʼһ֮ǰ˸ϵġ
Զ˶ټ˵
ֲﱣΣҰֲֹóԼǽСCITESƺϬǡǵȳɷֵҩͨ
ŷҶйƷڼҾ֪ضҩעͳҩİʸߴ60%ͳƹġ
ǻиóƶȣʵŷEECԻʵʩķǹ˰ݣҩΪƷ
˼ԣܹ㶨ʿ·϶ŵģҪ㶨ŷ·ߣԶԴ˱ʾɵ̬ȡ
ЩΣ£ɣҲܹһøУϾֻҪʿ·ˣ·ɣϺҲϾŬˣû뵽ԱԼ֪ĸ
ͷ˵
ȷʵ˵еҲŻ˵취չг
ʱȴ°˵
ǶǹҵIJƷȽϵƵĻձDZиҩĿӹ˾ʱDZߵĹ˾߹ȥ
ͨձĹ˾°װúҩķ֤飬ܳɷּ飬һ³ɷͬԼշǹ˾езҵΪԭϹӦ̣ͷա
ҾձתۺϹ˰Ϊ8%-12%ֱӳŷۺ˰25%-30%ձı
(1/2)ҳ,һҳĶ
ǩĶ