标题: help本月机警 [打印本页]
作者: maochun 时间: 2005-10-26 23:23 标题: help本月机警
5. Lines: X || Y, and what is the slope of Y ?
(1) Line X: y=-4
(2) Line X does not intersect with quadrants III and IV
作者: sammen 时间: 2005-10-27 04:07
2)因为可能X直线就是Y轴,Y轴不在3,4象限里的.
作者: maochun 时间: 2005-10-28 13:09
选d吗？
作者: sammen 时间: 2005-10-29 06:23
选A,条件2有2个可能,要么Y轴,要么平行于X轴.
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