关于NCB的百科

• 如图ＡＢ∥ＣＤ，∠NCM＝90°，∠NCB＝30°，CM平分∠BCE，求∠B的大小． 

• 问题详情：如图ＡＢ∥ＣＤ，∠NCM＝90°，∠NCB＝30°，CM平分∠BCE，求∠B的大小． 【回答】.解：∵CM平分∠BCE，∴∠BCE=2∠BCM．∵∠NCM＝90°，∠NCB＝30°，∴∠BCM=60°．∴∠BCE=120°．根据两直线平行，同旁内角互补，∵ＡＢ∥ＣＤ，∴∠BCE+∠B=180°．∴∠B=60°．知识点：平行线的*质题型：解答题...
• 2021-10-3030884

• NCB造句怎么写

• WesuggestedthatalltheEarlyPaleozoicpolesforNCBwereplacedintheAtlantic,andtheNCBlocatedinthesouthernhemisphereatabout15degreesintheEarlyPaleozoic.Intervention:minimalanterolateralacromialapproachtotheproximalhumerus,percutaneousfracturereduction,andmi...
• 2017-03-2118210