判断些列命题是真命题还是假命题,若是假命题,举一反列说明,.1】过已知直线上一点及该直线外一点的直线与已知直线必是相交直线;2】俩个正数的差仍是正数;3】一个角的补角必是钝角;
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![判断些列命题是真命题还是假命题,若是假命题,举一反列说明,.1】过已知直线上一点及该直线外一点的直线与已知直线必是相交直线;2】俩个正数的差仍是正数;3】一个角的补角必是钝角;](/uploads/image/z/14834495-47-5.jpg?t=%E5%88%A4%E6%96%AD%E4%BA%9B%E5%88%97%E5%91%BD%E9%A2%98%E6%98%AF%E7%9C%9F%E5%91%BD%E9%A2%98%E8%BF%98%E6%98%AF%E5%81%87%E5%91%BD%E9%A2%98%2C%E8%8B%A5%E6%98%AF%E5%81%87%E5%91%BD%E9%A2%98%2C%E4%B8%BE%E4%B8%80%E5%8F%8D%E5%88%97%E8%AF%B4%E6%98%8E%2C.1%E3%80%91%E8%BF%87%E5%B7%B2%E7%9F%A5%E7%9B%B4%E7%BA%BF%E4%B8%8A%E4%B8%80%E7%82%B9%E5%8F%8A%E8%AF%A5%E7%9B%B4%E7%BA%BF%E5%A4%96%E4%B8%80%E7%82%B9%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%B8%8E%E5%B7%B2%E7%9F%A5%E7%9B%B4%E7%BA%BF%E5%BF%85%E6%98%AF%E7%9B%B8%E4%BA%A4%E7%9B%B4%E7%BA%BF%EF%BC%9B2%E3%80%91%E4%BF%A9%E4%B8%AA%E6%AD%A3%E6%95%B0%E7%9A%84%E5%B7%AE%E4%BB%8D%E6%98%AF%E6%AD%A3%E6%95%B0%EF%BC%9B3%E3%80%91%E4%B8%80%E4%B8%AA%E8%A7%92%E7%9A%84%E8%A1%A5%E8%A7%92%E5%BF%85%E6%98%AF%E9%92%9D%E8%A7%92%EF%BC%9B)
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