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【简答题】
设X1，X2，…，Xn是来自正态总体N(μ，σ2)的一个样本，则有( )。
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【简答题】Katharine Houghton Hepburn was born in Hartford in 1907. The Hepburns made sure to educate their children about important political and social subjects and sports. She rode horses, swam and played gol...
【单选题】Katharine Hepburn made a change in the film world because ______.
A.
she set the model of independent woman in her films
B.
she had been starring roles of strong, spirited females in all her films
C.
she never believed females were inferior to their counterparts
D.
she led an independent way of living throughout her life
【简答题】三、图形推理：共10题。 第 71 题
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