单项选择题

The word "returns" in paragraph three can be best replaced by "______".

A．returning journeys
B．profits
C．savings
D．investments
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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
This passage is intended to give advice on ______.
A．how to avoid inflation risks
B．what kinds of bends to buy
C．how to get rich by investing in stock market
D．how to become richer by spreading the risk
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