B(yng)iiϵѴ һϡ
@tٿٿQ~SնiϿ10-15%^20%
ϡ
Ҫ֥ȡiϵϱϿ10%-25%IB(yng)25%;Ҫ10%ҪÓֻιiϲ˼
iϿ5-10%ĸiʺڲιNιǰ졣
Zʳ
СQ㶹ȡiϿ50%^60%
塢
QӼ~ǷѪë۵iϿ4-8%iιѪi~ۿ10%QӼ~۾ֻ5-6%@ϕrҪע}ױ
V|(zh)ϡ
̼ؐ}}ʳ}ȡiϿ1-2%ʳ}^0.5%ԪҪ(yn)Ҏ(gu)ʹ
Gϡ
ˮĸƼˮɏˮJˮr(nng)~ټޣӵȡ@G֭IB(yng)SһռϿ40%