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The point (not shown) with rectangular coordinates (m, n) is above line k. Column A Column B m
The point (not shown) with rectangular coordinates (m, n) is above line k. Column A Column B m
admin
2009-05-19
86
问题
The point (not shown) with rectangular coordinates (m, n) is above line k.
Column A Column B
m n
选项
A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案
B
解析
直角坐标为(m,n)的点(未标出)位于直线k的上方。
解:本题的正确答案为(B)。由直线k与x轴正方向的夹角等于45。可得直线k的方程为y=x。根据一般原则,若点在直线y=x上方,则其纵坐标的值大于横坐标的值,即y>x,若点在直线y=x的下方,则其纵坐标的值小于其横坐标的值,即y
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