题目内容
随机变量分为离散型随机变量和非离散型随机变量
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随机变量是定义在样本空间上的实值函数
随机变量类型中除了离散型就是连续型
Early in the 1920s, the most prominent of the new American playwrights, whose name is __1__, established on international reputation.
Of all the plays that O’Neill wrote, most of them are __1__, dealing with the basic issues of human existence and predicament such as life and death.
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