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d.innerHTML = d.innerHTML + '<a class=\"download_word download_word_lb\" href=\"javascript:;\" id=\"vipdown\" onclick=\"showpay(1)\"><em></em>下载文档(未登录)几种常见有毒气体中毒症状及急救常识描述：一氧化碳 中毒(一)理化性状及中毒原因一氧化碳是常见的有毒气体之一。凡是含碳的物质如煤、木材等在燃烧不完全时都可产生一氧化碳(C0)。～氧化碳进入人体后很快与血红蛋白结合，形成碳氧血红蛋白，而且不易解离。一氧化碳的浓度高时还可与细胞色素氧化</a>';
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