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【简答题】
设随机变量X的概率密度为Y=X 求：(1) Y=X 2 的概率密度；(2)Y=|X|的概率密度；(3) Y=ln|X|的概率密度．
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举一反三
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B.
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使患者恢复生活能力、重返社会
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配合医生治疗、使患者尽快恢复健康
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was planned
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has been planned
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had been planned
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were planned
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will sell
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sells
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would sell
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will be sold
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