硒和硒的很多化合物有毒。一次吸入大量含硒烟雾、二氧化硒或硒化氢，其作用相似硫化物，可产生鼻粘膜炎、鼻出血、嗅觉减退、恶心、头晕等症状。由于刺激肺泡可产生肺水肿，甚至造成严重的呼吸困难而危及生命。硒中毒后，口中有金属味，呼出的气有一股大蒜的臭味。硒和硒的化 Many compounds of selenium and selenium are toxic. A large number of selenium inhalation smoke, selenium dioxide or hydrogen selenide, its role similar to sulfide, can produce nasal mucositis, nosebleeds, loss of smell, nausea, dizziness and other symptoms. Pulmonary edema can occur as a result of irritation of the alveoli, and can even cause serious respiratory distress and endanger life. Selenium poisoning, the mouth of metal taste, exhaled gas has a smell of garlic. Selenium and selenium