从-9,-5,0,1,2,3,7七个数中,每次选不重复的三个数作为直线方程ax+by+c=0的系数则倾斜角为钝角的直线A.14 B.30 C.70 D.60
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![从-9,-5,0,1,2,3,7七个数中,每次选不重复的三个数作为直线方程ax+by+c=0的系数则倾斜角为钝角的直线A.14 B.30 C.70 D.60](/uploads/image/z/5178343-31-3.jpg?t=%E4%BB%8E-9%2C-5%2C0%2C1%2C2%2C3%2C7%E4%B8%83%E4%B8%AA%E6%95%B0%E4%B8%AD%2C%E6%AF%8F%E6%AC%A1%E9%80%89%E4%B8%8D%E9%87%8D%E5%A4%8D%E7%9A%84%E4%B8%89%E4%B8%AA%E6%95%B0%E4%BD%9C%E4%B8%BA%E7%9B%B4%E7%BA%BF%E6%96%B9%E7%A8%8Bax%2Bby%2Bc%3D0%E7%9A%84%E7%B3%BB%E6%95%B0%E5%88%99%E5%80%BE%E6%96%9C%E8%A7%92%E4%B8%BA%E9%92%9D%E8%A7%92%E7%9A%84%E7%9B%B4%E7%BA%BFA.14+B.30+C.70+D.60)
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