- developmentfinancecompany-DFCResearchonTheoriesandMethodsofDesignForCost(DFC)inConcurrentEngineeringDFC(DesignforCost)intheStructureDesignofCompositeMaterialsANALYSISOFCOUPLINGSENSITIVITYOFUNCONVENTIONALRESPONSESFORDIRECTFORCECONTROL(DFC)AIRCRAFT最終...
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- 問題詳情:將一幅三角板拼成如圖所示的圖形,過點C作CF平分∠DCE交DE於點F,(1)求*:CF∥AB,(2)求∠DFC的度數.【回答】(1)*見解析;(2)105°【分析】(1)首先根據角平分線的*質可得∠1=45°,再有∠3=45°,再根據內錯角相等兩直線平行可判定出AB∥CF;(2)利用三角形內角和定理進行計算即可.【詳解】解:(1)*...
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