2. 外语
  3. They were ______ in their scientific research, not knowing what happened just outside their lab.

They were ______ in their scientific research, not knowing what happened just outside their lab.

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问题 They were ______ in their scientific research, not knowing what happened just outside their lab.
选项 A、impaired
B、immersed
C、ignited
D、induced
答案B
解析 动词辨义。这四个选项都是过去分词，impaired表示“损害；使弱”；immersed表示“沉浸；陷入”，常与in连用，be immersed in sth．表示“沉浸于/沉溺于某事”，如：The professor was so immersed in her work that she didn’t notice me．(教授在专心致志地工作，以致没注意到我。)ignited意指“点火，点燃”，如：His enthusiastic speech ignited the audience．(他那热情的讲话使听众激动起来。)induced表示“劝诱，促使，导致，引起，感应”，如：What induced you to do such a foolish thing?(是什么引诱你做这样的傻事?)根据句意，科学家们专心于工作，所以B)项符合题目要求。
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