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- 3There_ a hill and a lake near our house.
- 4已知a+b=3,ab= -7/4,则ab^3+a^3b等于多少?
- 5对于分式(2x-a)/(3x-b),当x=-1时,分式无意义;当x=4时,分式的值为0,求a,b的值
- 6小丽用一块面积625cm²的正方形纸片,沿着边的方向裁出一块面积为270cm²的长方形纸片,
- 7would you please take the bed yourself before going to bed ,改错
- 8怎样速记1到30的平方和立方
- 9一条路上有东西两镇,一天,甲乙丙三人同时出发,甲乙从东向西行,丙从西向东行,当甲丙相遇时,乙距离他
- 10X乘以X等于40 ---------------------X=?