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【单选题】

thEy took______ mEAsurEs to prEvEnt poisonous gAsEs From EsCAping.
A. FruitFul
B. BEnEFiCiAl
C. suFFiCiEnt
D. EFFECtivE

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根据网考网移动考试中心的统计，该试题：

0%的考友选择了A选项

2%的考友选择了B选项

22%的考友选择了C选项

76%的考友选择了D选项

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