1ůʹБ(yng)ÑעЩ?
𣺢ه菡ôײȡڇ˽Բɢ۳ܺd≥2T/m2摪(yng)|oݵbʯĻ(f)ϵذއߜI(y)߱|ЙCԡҺDzů(ji)(yng)עMˮB(yng)o
2Ժĵůa(chn)ƷF(xin)B©Ҫԭʲôԓ̎?
F(xin)B©a(chn)ԭҪʹ|(zh)εļӟĿ͑ů˾ۺ(w)ܾS깩ůfů\л̎àB(ti);F(xin)}Ǽӟܵ͟ᡢ͉ܲ(yng)ԓQӟ䁡Ñ(yng)b˾؟(z)b˾Ҳ(yng)ܲa(chn)S؟(z)p(zh)V߀茣ДǷܶZSСr(sh)~ܸһůb˾@rаl(f)Ӗ(xn)ǑKʹ
ҲųÑڵůRøߜwpĹܵMˮض^ߌ(do)´ι^ǾҪԭҵ؟(z)ˣ֓pʧMaxдI(y)a(chn)ĹܲĺҎ(gu)İb˾ȞҪ
3
ˮůϵy(tng)ͨ{(dio)ԇ(yng)Ҫcʲô?{(dio)ԇ?
ϵy(tng)ͨ{(dio)ԇǴ_Mһ˺͙zO(sh)Ӌcʩ|(zh)һҪh(hun)(ji)JMСԇ\Еrμӟˮؑ(yng)^һҪƽ(wn);_(gu)ضһ׃m(yng)^
ʼӟr{(dio)ԇˮؑ(yng)ƽˮضȑ(yng)ڴˮrh(hun)ضȸ10Ҳ(yng)32棬(yng)Bm(x)\48СrԺÿ24Сrˮ3棬ֱ_O(sh)Ӌˮضڴ˜ض(yng)ÿMˮˮBӵļӟ·M{(dio)(ji)ֱ_O(sh)ӋҪ
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Bm(x)Ї߃rֵƷ50ИI(y)
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ůϵy(tng)ĂҪԭ