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【单选题】
VPN 的含义是A.
局 域网
B.
虚拟专用网络
C.
广域网
D.
城域网
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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】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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