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题目内容双击单词支持查询和收藏哦～
Many of the unusual behaviors attributed to crows—such as drinking coffee or presenting gifts to people who feed them—are based on (i)_____ and therefore fall into the category of (ii)_____ rather than science.
- Blank(i)
- long-term observation
- controlled experiments
- secondhand testimony
- Blank(ii)
- anecdote
- speculation
- hypothesis
secondhand testimony , anecdote 显示答案
以上解析由 考满分老师提供。
