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【单选题】
某试样中钙离子含量平均值的置信区间为42.16±0.10%(置信度为95%),对此结果应理解为( )A.
在95%的置信度下，试样中钙离子的含量在42.16~42.36%之间
B.
总体平均值μ落在此区间的概率为10%
C.
在此区间内的测量值不存在误差
D.
有95%的把握试样中钙离子的含量为42.26%
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举一反三
【单选题】When he was a boy, Mark Twain dreamed of traveling on river boats to______
A.
become a riverboat pilot
B.
gather material for his books
C.
make money
D.
enjoy himself
【简答题】One day a strong cowboy was traveling on his horse when he saw a bar. He decided to stop for a few drinks, so he tied(拴) his horse outside the bar, walked into the bar and ordered two bottles of beer....
【单选题】下列列表框属性中,是数组的是_________。
A.
ListCount (B) (C) (D)
B.
Selected
C.
ListIndex
D.
MultiSelect
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