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【单选题】
各样本观察值均加同一常数C后( )A.
样本均值不变,样本标准差改变
B.
样本均值改变,样本标准差不变
C.
两者均不变
D.
两者均改变
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【单选题】As we came into the supermarket, I got_____ from my parents.
A.
separated
B.
divided
C.
spared
D.
missed
【简答题】____________ (你们收取多少钱) a double room?
【简答题】本年投产项目个数的增长速度是： A.A.78．8％ B.B.-78．8％ C.C.21．2％ D.D.一21．2％
【简答题】自助餐你们收多少钱?How much do you ____for the buffer?
【单选题】The Hero My mother's parents came from Hungary, but my grandfather could trace his origin to Germany and also he was educated in Germany. Although he was able to hold a conversation in nine languages,...
A.
In Germany.
B.
In Hungary.
C.
In the United States.
D.
In New York
【简答题】人教版九年级上册数学习题21.2答案
【简答题】你们收多少钱?
【简答题】你们洗一部车要收多少钱? How much do you ( ) for washing a car?
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