ʯӢɰVһǶه?
lrg2019-11-25 18:53:23 | ˸dȤ | u֣3 | ղأ
ʯӢɰVһǶه?
ӋһʯӢɰVϵڶهأܶÑ@}{ееÑBԼ^VOݷeǶٶ]Ӌ^䌍@ǂܺεĆ}ͰӋʯӢɰVc֮gQĎNre£
ʯӢɰˮ̎VڞVػVйrˮ̎ʯӢɰVϵӋطʽһ㶼ǰӋ㡣ЩÑԃʯӢɰVϕroľһ@rҪʯӢɰVϵؾ֪һbׇʯӢɰVˡʯӢɰVҎ؞1.75kg/m3.Ҳfһ܉b1.75ʯӢɰVϡ߀ÑڲُʯӢɰVϵĕr֪Լ^VOݷeǶ٣ֻoLȡȺ߶ȣҪӋʯӢɰVϵbҪOL߁Ӌݷe@ЩrʯӢɰVϏSxӋÑOݷeQʯӢɰVϵbҲǞVϏSÿTҪġ܉͑QڌHʹеκy}ʹ҂Txo؟Σ
ʯӢɰVһǶهʯӢɰVһ1.75. 1.75/(أ1.75)e3=31.75=5.25˽ʯӢɰVϮaƷPYӍՈԒֱϵ ҲԵʯӢɰVϏSٷWվ Mв醣
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