-> dB˲ܳʲô
dBʲô
rg2014-1-6 10:42:51 dBt(y)Ժ
dBHҪעί߀(yng)ԓʳMdBʲô?ЩʳڰdB߿(f)ˑ(yng)ԓma(dng)Ȼʲôm@҂Ҫ֪ôdBʲô?҂́˽
dBʲô?dBt(y)hdBˑ(yng)ԼҳʳƷ(yng)ӻʳ⡢uţ̡ˮ(ˮʳƷ)߲(߲ʳƷ)~rȶҪҲҪʳcͨʳ(ۡ㽶ҡ˵)Աִͨ
H҅
1\ϙ\1.5ϙ12ϙϴõƬϙ석(sh)lvyȻ\ĩy(ni)\ϙÿСrʳl-2(x)֭
2rࡣr302ˣ100ɵм(x)ĩ{(dio)rδl-2ʳ
3˅ƤƤ10m˅Ƥȼȥȡ֭ǣ
4Ƥꐑc10100m(Ƭ)Ƥcͬ{(dio)2lշ
5轟X30ˣX1}m轡Xşу(ni)ˮm}{(dio)ζ
6ɽiɽ3015ˡi100ͬ҃(ni)ˮm}{(dio)ζִȡʳ
ͨ^ĽBdBʲôãҶ֪߀Ɇھ(lin)ϵ҂dBt(y)
аdBĆ}ՈԃھҞ
һƪ: dB˳ʲô^
һƪ: dBί(yng)ԓעʲô