2. 考研
  3. From the first paragraph, we learn that ______. The expression "snag" (Line 3, Paragraph 2) most probably means ______.

From the first paragraph, we learn that ______. The expression "snag" (Line 3, Paragraph 2) most probably means ______.

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问题 From the first paragraph, we learn that ______.
The expression "snag" (Line 3, Paragraph 2) most probably means ______.
选项 A、trap.
B、obstacle.
C、criticism.
D、advisory.
答案B
解析 第二段第四、五句The ethical snag is that the best stem cells are harvested from human embryos，killing them．For the most ardent pro-lifers，including...that is murder．本题为词义题，相对比较难，要求考生对文章的内容作细致的理解，推导出词的含义，同时还要对选项的词义熟悉。通过这两句可知很多人对这种研究是反对的，所以能够推出为"反对或问题，障碍"的意思，所以B正确。根据对上下文的理解即可知其他三个选项的说法都不够确切。
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