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- 1在一个长6dm,宽5dm,高3dm的长方体的个顶角挖去一个棱长1dm的小正方体,剩下的图形体积是多少?
- 2已知一个直角三角形,斜边的长度和一个锐角的度数,求那俩条边的长度?
- 3氢氧燃料电池可将热能直接转变为电能
- 4一批货,第一天运走这批货的1/4,第二天比第一天多运走这批货的1/8.第二天运走了这批货物的几分之几?
- 5已知:如图,E、F是平行四边形ABCD的对角线AC上的两点,AE=CF. 求证:(1)△ADF≌△CBE; (2)EB∥DF.
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- 7化简a/a-b - b-a+b + 2ab/a²-b²
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