单项选择题

According to the author, which of the following is not true to the Japanese

A．Robots mean there is no need to import cheap foreign later.
B．Robots mean that humans needn't do dirty and noisy work.
C．Robots mean there are no strikes nor overtimes.
D．Robots mean there is no mistake in any form.
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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
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.
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