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但是矿石进出口已经有了新规定。比如,2025 年 9 月 1 日即将实施的《GB/T 20424-2025》将铜精矿的砷含量限值从 0.5% 降至 0.3%,镍精矿汞含量限值收紧至 0.001%。
In recent years, many developing countries have started to grow their tourism industries. This trend is becoming more common ...
编者按:抗微生物药物耐药性(AMR)已成为全球公共卫生的重大挑战。为提升我国感染性疾病诊治能力与抗微生物药物合理应用水平,中国医药教育协会感染疾病专业委员会(IDSC)第十一届学术大会于近日在北京举行。会上,东京科学研究所具芳明(Yoshiaki ...
MEXICO CITY, July 20 (Xinhua) -- Gerardo Fernandez Norona, president of the Senate of Mexico, said on Friday that the country was willing to strengthen media and cultural exchanges with Xinhua News ...
普拉德-威利综合征(PWS)患者通常被认为无法可靠自述其觅食行为或其他暴食症状——例如为避免责罚而隐瞒进食行为,或因回忆和语言表达困难难以描述既往事件或内在状态。目前研究者和临床试验主要依赖父母或临床医生使用《暴食问卷》进行评估。基于前期对PWS患者 ...
集成的子系统,已针对包括小芯片(chiplet)在内的客户应用进行优化 楷登电子近日宣布业内首个 LPDDR6/5X 内存 IP 系统解决方案完成流片。该解决方案已经过优化,运行速率高达 14.4Gbps,比上一代 LPDDR DRAM 快 ...
楷登电子(美国 Cadence 公司)近日宣布业内首个 LPDDR6/5X 内存 IP 系统解决方案完成流片。该解决方案已经过优化,运行速率高达 14.4Gbps,比上一代 LPDDR DRAM 快 50%。全新的 Cadence® ...
China currently ranks among the top countries in the world in terms of rare earth reserves, production, consumption and ...
The exhibition, titled For National Liberation and World Peace, which opened on July 7, is being held at the Museum of the ...
近日,植物科学领域著名杂志Plant Biotechnology Journal在线发表了国家中药材产业技术体系、医学部药学院中药生物技术团队研究论文“Single-cell sequencing and mass spectrometry imaging reveal the multicellular compartmentalization map of plant triterpenes: ...
【是的,“China”】33年前,美国地图怎么标注西沙群岛和南沙群岛?汉语拼音注名,“China”指明归属,就是这么简单明了。 #这里是中国南海# Long before today's disputes, Western-published maps acknowledged China's historical claims in the South China Sea. A 1990s ex ...