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【单选题】
前置胎盘孕妇,产科检查的结果是A.
子宫大小与孕月一致，胎方位清楚，先露高浮
B.
子宫小于孕月，胎方位不清，腹部硬如板状
C.
子宫大于孕月，胎方位不清，子宫硬如板状
D.
子宫大小与孕月一致，胎先露已经入盆
E.
子宫大于孕月，胎先露已经入盆
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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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