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单选题
难度系数:

1.已知偶函数在区间上单调递减,则满足的取值范围是(    )
A:
B:
C:
D:
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  • 提示2IOagueaNrjxpbWcgd2lkdGg9ODQgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRjgvQjIvckJBQ0UxUUFPaF9RQ1A3dUFBQUIySDBoaU5zMDc3LnBuZyI+LDxpbWcgd2lkdGg9ODQgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRDYvQzgvckJBQ0ZGUUFPaC15eHJDYkFBQUIybUJKaEM0MTk5LnBuZyI+LOagueaNrumimOaEj+eUu+WHuueugOWbvu+8mjxicj48aW1nIHdpZHRoPTI4OSBoZWlnaHQ9MjU4IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRjgvQjIvckJBQ0UxUUFPaURRRzUzUUFBQXh1Z2t0bjNZOTUxLnBuZyI+
  • 提示3IOeUsemimOaEj+efpe+8mjxpbWcgd2lkdGg9OTcgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRjgvQjIvckJBQ0UxUUFPaUNEeWpBVEFBQUNQVlFlb0VvMTcyLnBuZyI+LOaJgOS7pTxpbWcgd2lkdGg9NzEgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRDYvQzkvckJBQ0ZGUUFPaUNoTkJFbkFBQUNWbGVLTXI4ODM2LnBuZyI+