- RegionalEnergyIntensityChangeDecompositionsBasedonGFITechnique;Therefore,inGFI,theorganizingprincipleisquitedifferenttotraditionallanguageteaching.GFISoftwareofCary,NorthCarolina,hasannouncedthatitsGFIMailEssentialsanti-spamandanti-phishingproductisn...
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- 問題詳情:如圖,正方形ABDE、CDFI、EFGH的面積分別爲25、9、16,△AEH、△BDC、△GFI的面積分別爲S1、S2、S3,則S1+S2+S3= .【回答】18.【解答】解:∵DF=DC,DE=DB,且∠EDF+∠BDC=180°,過點A作AI⊥EH,交HE的延長線於點I,∴∠I=∠DFE=90°,∵∠AEI+∠DEI=∠DEI+∠DEF=90°,∴∠AEI=∠DE...
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