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【单选题】
根据样本计算的用于描述总体特征的度量工具(如均值)被称为:
A.
参数
B.
总体
C.
样本
D.
统计量
拍照语音搜题，微信中搜索"皮皮学"使用
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正确
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错误
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14 years ago.
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When he was 30 years old.
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迎流侧
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for
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A.
was given
B.
would be given
C.
should give
D.
should be given
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【单选题】I have been away only for three years,_____ I can hardly recognize my hometown.
A.
yet
B.
so
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furthermore
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【判断题】若一个行列式中某行上的元素全为零,则该行列式的值一定为零。
A.
正确
B.
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after
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since
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【单选题】The manager insisted that I _______  a raise though I have been in this company for only six months.
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