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- 1she does not know ____for the party.
- 2甲数=2×3×a,乙数=3×5×a(a为非0自然数),如果甲乙两数的最大公因数是21,那么甲乙两数的最小公倍数是_.
- 3设函数f(x)=xlnx+(a-x)ln(a-x)(a>0). (Ⅰ)当a=1时,求函数f(x)的最小值
- 4已知全集U=R,集合A={x|(x+2)(x-1)>0},B={x|-1
- 5六年级下数学(先把答案给复制在答题)
- 6谁能翻译一下:My heart beat very fast at that moment for this was the first time for me to visit it
- 7昆虫记和童年好词60个好句30句
- 8平面内到定点F1(-1,0)与F2(1,0)的距离之差的绝对值等于为2的点的轨迹方程是?
- 9滑轮组的机械效率怎么算
- 10Help yourself to some fruit.