400-600-1123
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答案：
C
解这题必须
知道这是啥意思：
Y-intercept:X = 0 时,直线或曲线的相应 Y 坐标值.
X-intercept:Y = 0 时,直线或曲线的相应 X 坐标值.
所以根据我们常用的直线线段y=kx+b 这里的b就应该等于4；k应该是小于0 的，因为斜率为负嘛
这里推出来就应该是-4=kx 因为k小于0 那么x就应该大于0才能满足条件
现在算让y等于0的是时候，x的值 推出来x应该是大于0的
所以只有C 
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