2011年普通高等学校招生全国统一考试(安徽卷)中有一道这样的题目:在平面直角坐标系中,如果x和y都是整数,则称点(x,y)为整数,下列命题中正确的是:(1)存在这样的直线,既不与坐标轴平行又不经过任何整点; There is one such topic in the National Unified Examination for Enrollment in Colleges and Universities in 2011 (Anhui Volume): In the Cartesian coordinate system, if x and y are both integers, the point (x, y) is an integer and the following propositions are correct Is: (1) there is such a straight line that it is neither parallel nor parallel to the coordinate axis;