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【简答题】
I=10%, 现金流量如下,该方案是否可行?
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举一反三
【简答题】Billy and Bobby were small boys. They were brothers, and they often fought each other. Last Saturday their mother said to them, “I’m going to cook our lunch now, go out and play in the garden……and be ...
【单选题】加权算术平均数的大小受各组( )
A.
次数（f）的影响最大;
B.
标志值（x）的影响最大
C.
权数（f／Σf）的影响最大t;
D.
标志值（x）和次数（f）的共同影响
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【简答题】A． schools B． classes C． meals D． students
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