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【单选题】

The future ______ of the bald eagle is still an importantAmerican ecological concern.
A. birth
B.evolution
C.migration
D.survival

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根据网考网移动考试中心的统计,该试题:

10%的考友选择了A选项

5%的考友选择了B选项

6%的考友选择了C选项

79%的考友选择了D选项

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