2. 外语
  3. A、It has already been settled. B、It has caused much dispute. C、It is not as difficult as expected. D、It is unlikely to be solved

A、It has already been settled. B、It has caused much dispute. C、It is not as difficult as expected. D、It is unlikely to be solved

admin2021-09-17  126
问题
选项 A、It has already been settled.
B、It has caused much dispute.
C、It is not as difficult as expected.
D、It is unlikely to be solved soon.
答案A
解析 该句中的they used…to crack the problem表明Greg Asner与其同事已解决了如何估算森林存储碳量的难题。因此，本题应选A。
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大学英语六级

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