单项选择题

The word "unwieldy" in the second paragraph is closest in meaning to ______.

A．difficult to collect
B．difficult to tackle
C．incomprehensive
D．uncontrollable
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单项选择题
What is the passage mainly concerned with
A．Development and application of statistics.
B．Origin of descriptive statistics.
C．Limitations of inferential statistics.
D．Importance of statistics.
单项选择题
A sample of a population is often examined for the following purposes except ______.
A．to make a more accurate prediction of trend
B．to improve efficiency and aw)id unnecessary work
C．to save the trouble of approaching every members
D．to predict characteristics of the entire population
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