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- 1Ann often goes home to help her mother ___ the housework.
- 2英语作文题是how to spend you leisure time with your family?
- 3在半径为9米的圆形花坛外面有一条宽1米的环形小路,这条小路的面积是多少平方米?
- 4如图所示,在x轴上方有垂直于xy平面向里的匀强磁场,磁场的磁感应强度为B.在x轴下方有沿y轴负方向的匀强电场,场强为E.一质量为m、电量为-q的粒子从坐标原点O沿着y轴正方向射出,射
- 5左边一个竖心旁右边一个寸怎么读
- 6已知x>y,且x+y=5,xy=4,求根号x+根号y分之根号x-根号y.
- 7I started to play football when I was five.(同义句)I started to play football___ ___ ___ ___ five
- 8设方程x^n+x^(n-1)+x^(n-2)+.+x=1 在(0,1)内有唯一根为Xn,并求lim(n→+∞)Xn.
- 9According to a recent US survey,children spent up to 25 hours a week( )TV
- 10因式分解:a的三次方-5a的平方+5a-4