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【多选题】
下列关于几种概率分布之间的关系的陈述中，正确的有（）。A.
二点分布（0－1分布）是二项分布的特例
B.
当n很大而p又很小时，二项分布可用参数λ＝np的泊松分布近似
C.
当N很大而M/N很小是，超几何分布趋于二项分布
D.
当n＞30时，不管p大小，二项分布的概率都可用正态分布来近似计算
E.
当n无限增大时，二项分布趋近于正态分布
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