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【单选题】
表示均数抽样误差的大小的统计指标是( )A.
标准差
B.
方差
C.
标准误
D.
变异系数
E.
样本标准误
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举一反三
【单选题】What prophesy has been made about Macbeth?
A.
He will be the Boy Who Lives.
B.
He will one day be King of Scotland.
C.
He will die young.
D.
He will prick his finger on a spinning wheel and fall into a deep sleep
【简答题】England has been the birthplace of most of the great English-language theater written throughout history. Most of the plays in England that are truly famous have something in common. They usually come...
【判断题】Macbeth has been the most popular of Shakespeare’s plays in the last 400 years. It was the first of Shakespeare’s play s to be translated into Chinese. (F)
A.
正确
B.
错误
【简答题】有两块直流毫安表,它们的准确度等级和量限分别为 1.0 级, 0 ~ 250mA ; 2.5 级, 0 ~ 75mA 现要测量 50rnA 的直流电流,为了减小测量误差,应选那块表好?为什么?
【单选题】八七会议使中国共产党在政治上大大前进了一步,开始了( )
A.
从大革命失败到土地革命战争兴起的转折
B.
从大革命失败到抗日战争兴起的转折
C.
从大革命失败到解放战争兴起的转折
D.
从大革命失败到北伐战争兴起的转折
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