- 问题详情:在平行四边形ABCD中,∠B=60°,那么下列各式中,不能成立的是()A.∠D=60° B.∠A=120° C.∠C+∠D=180° D.∠C+∠A=180°【回答】D【考点】平行四边形的*质;多边形内角与外角.【专题】压轴题.【分析】由于平行四边形中相邻内角互补,对角相等,而∠A和∠C是对角,而...
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- 1、Theaverageeggweight,thebodyweightatD30,thebodyweightatD60andtheactivityofGPTatD60werethemaintraitsforthecontribution.2、ATestStudyOnElectrochemicalMechanicalFinishingD60TungstenSteel3、ThemainreasonofceramictoolWearingiscomingoffthehardgrainduring...
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