文档介绍：小学生饮水安全
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the rning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
13种有害物质，其中卤化烃、***仿还具有致癌、致畸作用。当水温达到90℃时，卤代烃含量由原来的每公斤53微克上升到177微克，超过国家饮用水卫生标准的2倍。专家指出，饮用未煮沸的水，患膀胱癌、直肠癌的可能性增加21%-38%。当水温达到100℃，这两种有害物质会随蒸气蒸发而大大减少，如继续沸腾3分钟，则饮用安）
9、为什么夏天不能一次性大量饮用冰镇水
（口渴或炎炎烈日下猛灌生水或冰镇水，会导致汗孔排泄不畅，机体散热困难，最终因余热蓄积而诱发人体免疫力下降、中暑。口渴或天气炎热时应喝开水或加盐的温开水）。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of th