swap(&arr[low], &arr[j]);
Source: Computational Materials Science, Volume 266
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The UK will phase out traditional home phones by 2027, but the switchover has been stressful for some. How do you feel about the change?
看脱贫地区，“产业普遍搞起来了，但技术、资金、人才、市场等支撑还不强”。
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