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发布时间:2024-09-20 04:10:29

[单项选择]What percentage of the total distribution are 1 sigma from the mean equal to ().
A. 68.8%
B. 99.9%
C. 95.5%
D. 99.7%

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[单项选择]What is the total number of different 5-digitnumbers that contain all of the digits 2,3,4,7 and 9 and in which none of the odd digits occur next to each other
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[单项选择]In what way does free float differ from total float ?()
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[单项选择]

The percentage of immigrants (including those unlawfully present) in the United States has been creeping upward for years. At 12.6 percent, it is now higher than at any point since the mid-1920s.
We are not about to go back to the days when Congress openly worried about inferior races polluting America’s bloodstream. But once again we are wondering whether we have too many of the wrong sort of newcomers. Their loudest critics argue that the new wave of immigrants cannot, and indeed do not want to, fit in as previous generations did.
We now know that these racist views were wrong. In time, Italians, Romanians and members of other so-called inferior races became exemplary Americans and contributed greatly, in ways too numerous to detail, to the building of this magnificent nation. There is no reason why these new immigrants should not have the same success.
Although children of Mexican immigrants do better, in terms of educational and professional atta
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[单项选择]The percentage of teenagers who have tried cannabis is ______.


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A. 44%
B. 49%
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[填空题]Si n gle
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B. interprets
C. assumes
D. makes

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