平均值和中位数的背离，进一步印证了上述趋势——一方面，研发人员数量平均值由上年的722人提升至731 人；另一方面，研发人员的中位数却从上年的216 人降至213 人。这意味着，少数研发密集型企业大量增聘研发人员，多数中小型企业的团队规模维持稳定或略有收缩。
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Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.，更多细节参见91视频
10Washing and drying the bulk raw material to prevent spoilage also isn’t easy. During WWII, volunteers in Britain occasionally dammed natural streams to wash the seaweeds and used hot air from a bakery to dry them. Praising the concerted efforts of volunteers, the UK Ministry of Supply concluded that “all belligerent countries should have a local source” of agar.
。关于这个话题，im钱包官方下载提供了深入分析
Организаторы оманского фестиваля «Верблюжий клуб» заявили, что полны решимости пресечь все акты фальсификации и обмана, и пообещали применять к нарушителям строгие санкции.
Britain has become the "most expensive place in the world" to build nuclear power plants, according to a government review of nuclear regulation.。Line官方版本下载对此有专业解读