不同理解,答案不同,如隨機過程,0.5不錯.第一個是男孩,也對.象您第四題語意不清.1/2太大了.寫清楚一點,我再祘.我古稀之年,算錯是常有的,但概念一般不會錯.請諒.
不同理解,答案不同,如隨機過程,0.5不錯.第一個是男孩,也對.象您第四題語意不清.1/2太大了.寫清楚一點,我再祘.我古稀之年,算錯是常有的,但概念一般不會錯.請諒.
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