2. 职称英语
  3. A、the sample was favorable for their testB、the sample made the test more diffic

A、the sample was favorable for their testB、the sample made the test more diffic

游客2023-08-06  1
问题
选项 A、the sample was favorable for their test
B、the sample made the test more difficult
C、the sample brought about little benefits
D、the sample produced unexpected results
答案 A
解析 从第6段第2句中的ideal和最后一句中的tens of thousands of times more DNA等可知研究人员认为格陵兰岛的样本对他们的研究带来非常积极的帮助，因此，本题应选A。
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