单项选择题
设随机变量X服从二项分布b(16,0.9),则下列计算结果中,正确的有()。A.E(X)=1.6B.E(X)=...
多项选择题设随机变量X服从二项分布b(16,0.9),则下列计算结果中,正确的有()。
A.E(X)=1.6B.E(X)=14.4C.σ(X)=1.44D.σ(X)=1.2E.Var(X)=1.44
With his firm handling of the dispute, he earned the re...
填空题With his firm handling of the dispute, he earned the re() of his opponents.
止带方用于下列哪一型子宫颈炎 ( ) A.肾阳虚型 B.脾虚型 ...
单项选择题止带方用于下列哪一型子宫颈炎 ( ) A.肾阳虚型 B.脾虚型 C.湿热下注型 D.热毒蕴结型 E.脾虚湿蕴型