单项选择题

In statistics the most frequently used computations are the mean, the median, and the mode because all are indicators of central tendency.

A. graphs
B. variables
C. calculations
D. words
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单项选择题
In 1925 Clarence Darrow competently opposed William Jennings Bryan at the renowned Scopes' Monkey Trial .
A. adeptly
B. maliciously
C. privately
D. rashly
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