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单选题
难度系数:

1.已知变量x,y满足的值范围是()
A:
B:
C:
D:
  • 提示1IOeUu+WHuue6puadn+adoeS7tuaJgOihqOekuueahOW5s+mdouWMuuWfn+WPr+efpe+8jOivpeWMuuWfn+aYr+eUseeCuTxpbWcgd2lkdGg9MTQxIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzQyLzYwL3JCQUNKMVRRSjZMelRNb3RBQUFEbkFNV0NTSTA0My5wbmciPuaJgOWbtOaIkOeahOS4ieinkuW9ouWMuuWfn++8iOWMheaLrOi+ueeVjO+8ieOAgg==
  • 提示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
  • 提示3IOaxguWHuuaWnOeOh+eahOWPluWAvOiMg+WbtOOAgg==