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【单选题】

The best solution to the problem can only be found by a process of trial and ______.
A．error

B．mistake
C．success
D．experiment
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根据网考网移动考试中心的统计，该试题：

77%的考友选择了A选项

11%的考友选择了B选项

1%的考友选择了C选项

11%的考友选择了D选项

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