转自：扬子晚报 2月18日，@参考消息：据法新社2月17日报道，美国总统唐纳德·特朗普17日通过"真实社交"网站发布 消息称，东京与华盛顿签署的贸易协定框架下的日本投资计划正式启动。 作为美国降低附加关税的交换条件，日本去年7月承诺到2029年对美投资5500亿美元。然而，由于在具 体实施方式和待融资具体项目上存在分歧，该计划一度被推迟。 特朗普强调称："这些项目的规模如此之大，如果没有'关税'这个极其特殊的词，就不可能实现。" 他还宣称，计划在俄亥俄州建造的燃气发电厂将是"有史以来规模最大的"，而在得克萨斯州建造的"液 化天然气终端"将加强"我们的能源主导地位"。 卢特尼克在声明中提到，得克萨斯州的一个深水石油码头预计将实现"200亿至300亿美元的原油出口"。 来源 | 参考消息 据报道，特朗普透露，首批项目分别涉及得克萨斯州的石油和天然气战略领域、俄亥俄州的能源生产以 及佐治亚州的关键矿产资源。" 美国商务部长霍华德·卢特尼克在社交平台X上发布的一份声明中称，这些项目"代表了对我国经济360亿 美元的投入"。 报道说，相关项目涉及用于半导体工业的人造金刚石、一个石油港口码头以及为人工智能数据中心供电 的 ...

Core Viewpoint - The article discusses the dangers of hydrofluoric acid (HF), highlighting its strong corrosive properties and the severe health risks associated with exposure, particularly in laboratory settings [2][6][24]. Group 1: Understanding Hydrofluoric Acid - Hydrofluoric acid is a solution of hydrogen fluoride (HF) and is used in various laboratory applications, including semiconductor manufacturing and glass etching [4][6]. - It has a high boiling point of 19.5°C and can easily form irritating acid mist at room temperature [6]. - The acid is classified as a strong acid, with a partial ionization in water, and its fluoride ions have a high nucleophilicity, making it effective for etching glass [6][7]. Group 2: Health Risks and Incidents - Skin contact with hydrofluoric acid can lead to severe pain and tissue damage, often with delayed symptoms that can result in irreversible harm [7][8]. - Exposure to just 5 mL of 50% hydrofluoric acid can be fatal within 12 hours, and inhalation of 1000 ppm can cause loss of consciousness in 30 seconds [8]. - There are numerous documented incidents of hydrofluoric acid exposure in laboratories, leading to severe injuries and fatalities [9][12][24]. Group 3: Emergency Response - The article emphasizes the importance of immediate action within the "golden 20 minutes" following exposure, which includes thorough washing of the affected area with water [16][18]. - After washing, applying 2.5% calcium gluconate gel is recommended to neutralize the acid and alleviate pain [18]. - Medical attention should be sought promptly, with specific information about the exposure provided to healthcare professionals to avoid misdiagnosis [19][20]. Group 4: Safety Precautions - Preventive measures are crucial, including the use of fume hoods, appropriate personal protective equipment (PPE), and emergency wash stations in laboratories [21]. - The article also warns about the potential risks of consumer products containing fluoride, such as cleaning agents and rust removers, which can pose hazards if not handled properly [22][24].