- Wheth2ertheIPAcanbeproperlyfundeddeterminesthesuccessoftransitionofChina′spensionsystem.Onthebasisoftheexperimentsandthetestofsamples,thispapergivesanexplanationofseveralproblemsconcerningtheappliancedesign,whichshouldbep......
- 32748
- 问题详情:如图,BN是∠ABC的平分线,点P在BN上,点D,E分别在AB,BC上,∠BDP+∠BEP=180°,且∠BDP,∠BEP都不是直角,求*:PD=PE.【回答】*:如图,过点P分别作PF⊥AB于点F,PG⊥BC于点G,∵BN是∠ABC的平分线,∴PF=PG.又∵∠BDP+∠BEP=180°,∠PEG+∠BEP=180°,∴∠BDP=∠PEG.在△PFD和△PGE中,∵∴△PFD≌△PGE...
- 28241
- 问题详情:如图,AB∥CD,EF与AB、CD分别相交于点E、F,EP⊥EF,与∠EFD的平分线FP相交于点P,且∠BEP=50°,则∠EPF=()度.A.70 B.65 C.60 D.55【回答】 A.知识点:平行线的*质题型:选择题...
- 18826