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- 2用一个边长为10cm的正方形围成一个圆柱的侧面(接缝略去不计),求该圆柱的体积.
- 3the old machine ____ the room wet a used to keep b was used keep c ussed to keeping dwas used
- 4均匀带电球面内部电场强度
- 5平行四边形的高等于梯形的(),每个梯形的面积都等于平行四边形面积的(),所以梯形的面积=(),
- 6如图所示正五角星是轴对称图形,它有_条对称轴.
- 7英语翻译
- 8用适当形式填空1.There are man__(rain) days in spring.2.___(there be) some peanuts.
- 9I have some nice flowers.改成一般疑问句
- 10在三角形ABC中,AB=5,AC=3,D为BC的中点,且AD=4,求BC边的长.