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Not every modern human has the same set of Neanderthal DNA, however; different people will, by chance, have inherited different fragments. But there are also some areas, termed "Neanderthal deserts," where none of the Neanderthal DNA seems to have persisted. Notably, the largest Neanderthal desert is the entire X chromosome, raising questions about whether this reflects the evolutionary fitness of genes there or mating preferences.
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春节期间，北京亦庄，目之所及皆是鼓足干劲、奋力拼搏的蓬勃景象。
在少子化與高齡化的趨勢下，台灣各類勞力密集的工作多由外籍移工承擔。目前台灣有超過50萬名「產業移工」，是外籍勞動人口的最大宗，其次為家庭看護工。