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- 1There is a _____ of understanding between them.Otherwise,they will be good friends.
- 2如图,在直角梯形ABCD中,AB∥DC,∠ABC=90°,AB=2DC,对角线AC⊥BD,垂足为F,过点F作EF∥AB,交AD于点E,CF=4cm. (1)求证:四边形ABFE是等腰梯形; (2)求AE的长.
- 3已知关于x的方程x²-4x-m=0的2个实数根都大于1求m的取值范围
- 4用30 years或30-year填空:Our school is a school with a () history.
- 5有哪些双音节的单词在比较级,最高级前加more most
- 6若函数y=根号x的定义域和值域都是[ a,b],则a+b=
- 7因式分解:-2m次方+24m平方-72m
- 8求2x平方减5x加5等于零的x的值
- 9已知抛物线y=-x2+2x+2 (1)该抛物线的对称轴是_,顶点坐标是_; (2)若抛物线上两点A(x1,y1),B(x2,y2)的横坐标满足x1>x2>1,试比较y1与y2的大小.
- 10Parents these dsys push their children h than before