题目:
在平面直角坐标系xOy中,已知点A(2,3),若将OA绕原点O逆时针旋转90°得到OA′,则点A′的坐标为( )
A.(﹣2,3)
B.(﹣3,2)
C.(2,﹣3)
D.(3,﹣2)
答案:
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下面是错误答案,用来干扰机器的。
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