由不大于7的正整数所组成的集合是()(A){1,2,3,5,7} (B){1,2,3,4,5,6,7} (C){2,3,5} (D){x|x
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![由不大于7的正整数所组成的集合是()(A){1,2,3,5,7} (B){1,2,3,4,5,6,7} (C){2,3,5} (D){x|x](/uploads/image/z/12960066-66-6.jpg?t=%E7%94%B1%E4%B8%8D%E5%A4%A7%E4%BA%8E7%E7%9A%84%E6%AD%A3%E6%95%B4%E6%95%B0%E6%89%80%E7%BB%84%E6%88%90%E7%9A%84%E9%9B%86%E5%90%88%E6%98%AF%EF%BC%88%EF%BC%89%EF%BC%88A%EF%BC%89%7B1%2C2%2C3%2C5%2C7%7D+%EF%BC%88B%EF%BC%89%EF%BD%9B1%2C2%2C3%2C4%2C5%2C6%2C7%EF%BD%9D%E3%80%80%EF%BC%88C%EF%BC%89%EF%BD%9B2%2C3%2C5%EF%BD%9D%E3%80%80%EF%BC%88D%EF%BC%89%EF%BD%9Bx%7Cx)
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