B(yng)i(chng)iϵѴ
һ
@tٿٿQ~SնiϿ10-15%^(gu)20%
Ҫ֥iϵϱϿ10%-25%I(yng)B(yng)25%;Ҫ10%ҪÓֻιiϲ˼
㡢iϿ5-10%ĸiʺڲιNιǰ
Zʳϡ
СQ㶹ȡiϿ50%^(gu)60%
(dng)ϡ
QӼ~ۡǷѪۡë۵iϿ4-8%iιѪi~ۿ10%QӼ~۾ֻ5-6%@ϕr(sh)Ҫע}ױ
V|(zh)ϡ
̼ؐۡ}}ʳ}ȡiϿ1-2%ʳ}^(gu)0.5%ԪҪ(yn)Ҏ(gu)ʹá
Gϡ
ˮĸƼˮɏˮJˮr(nng)~ټޣӵȡ@G֭I(yng)B(yng)SһռϿ40%