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伽利略正确不解释大小两铁球地心引力实验
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设集合A={0,1,2,4,5,7}B={1,3,6,8,9},C={3,7,8}那么集合(A∩B)∪C是()
已知全集U={0,1,2,3,4,5,6,7,8},集合A={0,1,2,3},集合8={2,3,4,5,6}求(1)A∪B,A∩B(2...已知全集U={0,1,2,3,4,5,6,7,8},集合A={0,1,2,3},集合8={2,3,4,5,6}求(1)A∪B,A∩B(2)CuA,CuB