2. 外语
  3. A、has been decreased lately B、has been increased lately C、has been underestimated D、has been overestimated D最后一段第1句表明Markku Kann

A、has been decreased lately B、has been increased lately C、has been underestimated D、has been overestimated D最后一段第1句表明Markku Kann

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问题
选项 A、has been decreased lately
B、has been increased lately
C、has been underestimated
D、has been overestimated
答案D
解析 最后一段第1句表明Markku Kanninen认为碳汇数据有改善的必要，not precise说明碳汇数据一直以来不够准确，但到底数据是“过高”，还是“过低”呢?结合第1段首句就知道了，该句中的less…than we thought表明我们一直都高估了森林存储碳的能力。因此本题应选D，并排除C。
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大学英语六级

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