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- 1求二次函数y=3x²-6x-1与x轴交点的坐标,并作草图验证
- 2they were also quite sure that
- 3在矩形ABCD中,AB等于3,BC等于4,PC垂直平面ABCD,PC等于1,则点P到BD的距离为
- 4妈妈买了2千克香蕉和3 千克苹果,共付了38.2元1千克香蕉5.6元 ,1千克苹果多少元,解方程
- 5The twins ____ Canada for three weeks. A.has been to B.have been to C.have gone to
- 6用描述发表示:平面直角坐标系中,二次函数Y=X平方+1图像上所有点组成的集合
- 7在△ABC中,若sin2A=sin2B+sin2C+3sinBsinC,则角A的值为( ) A.5π6 B.2π3 C.π3 D.π6
- 8如图,在△ABC中,∠C=90°,AD平分∠BAC,DE⊥AB,如果DE=5cm,∠CAD=32°,求CD的长度及∠B的度数.
- 9函数y=2sin(3x+π/4) 1定义域 2值域 3对称中心 4对称轴 5单调递增区间6单调递减区间
- 10Tim is generally considered to have founded the world wide web.分析句子成分