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【简答题】
抽象的目的是产生( )并求解。
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反馈参考答案：
举一反三
【单选题】To say that stock prices follow a "random walk" is to argue that
A.
stock prices rise, then fall, then rise again.
B.
stock prices rise, then fall in a predictable fashion.
C.
stock prices tend to follow trends.
D.
stock prices cannot be predicted based on past trends.
【单选题】Why do the students say this:
A.
To recommend against buying stock in a corporation
B.
To explain why consumers need to be very cautious
C.
To give reasons why governments regulate corporations
D.
To complain about negative trends in advertising
【单选题】To say that stock prices follow a "random walk" is to argue that
A.
stock prices rise, then fall.
B.
stock prices rise, then fall in a predictable fashion.
C.
stock prices tend to follow trends.
D.
stock prices are, for all practical purposes, unpredictable.
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