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【单选题】

A、They can prove the climate change clearly.

B、They are very important in the food chains.

C、They play a leading role in reducing global warming.

D、They are growing and flowering much faster than before.
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根据网考网移动考试中心的统计,该试题:

6%的考友选择了A选项

79%的考友选择了B选项

6%的考友选择了C选项

9%的考友选择了D选项

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