题目内容
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提问人：网友13***556
发布时间：2022年4月18日 21:41
[单项选择题]
Anthropologists, psychologists and others have begun seeking the roots of ambition in family, cultur...By using the word "imponderables" in Paragraph 4, the author suggests that ______ .
A．some people are much more ambitious than others
B．some studies are hardly successful
C．some variables are difficult to calculate approximately
D．some twins show a tremendous likeness to each other
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