BOOSTGRE题库
您还没有登录，登录以后才可以查看答疑和进行提问。

试题详情

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)Blank(ii)
A、long-term observationD、anecdote
B、controlled experimentsE、speculation
C、secondhand testimonyF、hypothesis
答案：C,D

专业教师答疑

问个问题