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【单选题】

in thE mAss ExtinCtion 65 million yEArs Ago, ______ oF All spECiEs on EArth vAnishED.
A.two thirDs
B.hAlF
C.90%
D.30%

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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

77%的考友选择了B选项

11%的考友选择了C选项

2%的考友选择了D选项

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