不同理解,答案不同,如随机过程,0.5不错.第一个是男孩,也对.象您第四题语意不清.1/2太大了.写清楚一点,我再祘.我古稀之年,算错是常有的,但概念一般不会错.请谅.
不同理解,答案不同,如随机过程,0.5不错.第一个是男孩,也对.象您第四题语意不清.1/2太大了.写清楚一点,我再祘.我古稀之年,算错是常有的,但概念一般不会错.请谅.
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