YԓҪΣ~o~ϲ߶l(f)~~ڳF(xin)ˮnGɫc(din)U(ku)ʈAλҎ(gu)tδߣ\ɫҰɫ߅ɫкɫҎ(gu)tėlyɢСc(din)~вŤ(yn)ؕr(sh)~ƬsҒo϶~L(zhng)looˮnGɫ߅ںɫ\ɫҰɫl(f)_SСc(din)ڶ֭oϣߔU(ku)չѸ(ni)ɭh(hun)oϲήƤӾoNoSСc(din)ܼг݆ͬyoܺt絹
ԭl(f)F(xin)~~ݲһNԲԭ~~c(din)ԓҪڼ?bo)wM(ni)ͷNϴԽͨ^(gu)ˮαMRͳĭh(hun)lڲl(f)ֲL(zhng)˥ڲȾͼ¶Ľ~67·ݰl(f)
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1ȾԴl(f)gr(sh)ժ~γL(zhng)ĩ@ԃ(ni)Ꚉ?bo)wpȾ(li)Դ
2NNǰ50%pɝԷۄN0.2%0.3%N(li)1000ҺN1015ɷֹ絹
3M(jn)ˮMֲϷˮԜp~ȺˮwRעֲgͨL(fng)ưl(f)l
4ˎΣ_ǰôɭ\500Һ50%(li)ؿɝԷۄ10002000ҺF
5҃(ni)ҪעͨL(fng)Q⣺҃(ni)ضȿ16z϶pٲl(f)
һƪ ˮܽصĻB(yng)ֳ