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#3fb9dd24-5eef-47aa-8cd8-7f89a0cea31d基础填空题交集定义与运算集合与常用逻辑用语

19.已知集合A={xx=2k+1A=\{x\vert x=2k+1kZ}k\in Z\}B={xx=4k+1B=\{x\vert x=4k+1kZ}k\in Z\}C={xx=4k+2C=\{x\vert x=4k+2kZ}k\in Z\},则((  ))

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