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  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、submerged
B、drowned
C、immersed
D、dipped
答案C
解析 根据句意：“他们沉浸在他们的科学实验中，都不知道实验室外面发生了什么”。本题考查词义辨析。只有immerse oneself in表示使(自己)专心于[沉浸于]……的意思。
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