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The scientist has ______ the behavior of birds all his life.A、noticedB、seenC、n
The scientist has ______ the behavior of birds all his life.A、noticedB、seenC、n
游客
2025-04-04
42
管理
问题
The scientist has ______ the behavior of birds all his life.
选项
A、noticed
B、seen
C、notified
D、observed
答案
D
解析
observe vt.观察,注意到,察觉到;说,评论;遵守,奉行。
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