B(yng)i(chng)iϵѴ
һ
@tٿٿQ~SնiϿ10-15%^20%
Ҫ֥iϵϱϿ10%-25%I(yng)B(yng)25%;Ҫ10%ҪÓֻιɡiϲ˼
ϡ
㡢iϿ5-10%ĸiʺڲι㡣Nιǰ
ġZʳ
СQ㶹ȡiϿ50%^60%
(dng)
QӼ~ǷۡѪë۵ȡiϿ4-8%iιѪi~ۿ10%QӼ~۾ֻ5-6%@ϕr(sh)Ҫע}ױ
V|(zh)ϡ
̼ؐ}}ʳ}iϿ1-2%ʳ}^0.5%ԪҪ(yn)Ҏ(gu)ʹ
G
ˮĸƼˮɏˮJˮr(nng)~ټޣӵ@G֭I(yng)B(yng)SһռϿ40%