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【多选题】
造成拉丁语分崩离析的原因包括()。A.
缺乏规范性语法
B.
缺乏规范性书写方式
C.
语言的普及程度不够
D.
语言的难度太大
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】Mozart was born 1 January 27, 1756, in Austria. When he was only three,he asked for music lessons. He could think of nothing 2 music. The child learned 3 by watching and 4 the music that was played in...
【多选题】样本均值的两个基本性质是:?
A.
若称样本中的数据与样本均值的差为偏差,则样本所有偏差之和为0
B.
数据观察值与均值的偏差平方和最小
C.
样本均值等于观测值的中值
D.
样本均值等总体均值
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【简答题】Mozart was born 1 January 27, 1756, in Austria. When he was only three, he asked for music lessons. He could think of nothing 2 music. The child learned 3 by watching and 4 the music that was played i...
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