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转一篇从数理统计角度关于病毒起源的分析# z; i, ?; ]: G- [; `
https://user.guancha.cn/main/content?id=285543&s=fwzwyzzwzbt* g, ?- n8 v* N5 ~- I; [; }
' F/ Z, t- s5 C9 {, E2 SRockland County population 325,789 (2019)9 i, ]; Z6 x- {- x' ~" ?
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Rockland County COVID-19 cases 9,699 by April 22
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9699 / 325789 = 2.98% !
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: [1 g* }% n; i/ P2 h- Z4 ZHow to Get Rid of Bats in the Attic1 g$ v1 U# {- n( G6 p# l0 J2 K
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补充内容 (2020-4-22 23:04):
( \$ w: e* G6 z/ D8 o7 KThere have been 23,150 tests performed here (Rockland County), with a 41.9% rate of positives.
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