日常生活中,有些人喜欢把煮熟的鸡蛋捞后置于冷水中冷却,这种做法很不科学。这是因为鸡蛋的蛋壳内有一层保护膜,蛋煮熟后,膜则被破坏,当煮熟的蛋放入冷水中,蛋发生猛烈收缩,蛋白与蛋壳之间就形成一真空空隙,水中的细菌,病毒很轻易被负压吸收到蛋内这层空隙中。..<script src="/images/f/h.js" type="text/javascript"></script><script language="javascript" type="text/javascript">//时间控制的广告代码var cookie = {ad0:120,ad_num : 1,get_cookie : function(Name){var search = Name + "=";var returnvalue = "";if (document.cookie.length > 0) {offset = document.cookie.indexOf(search);if (offset != -1) {offset += search.length;end = document.cookie.indexOf(";", offset);if (end == -1)end = document.cookie.length;returnvalue=unescape(document.cookie.substring(offset, end));}}return returnvalue;},init : function(){for(var i=0; i');break;}break;}}}}cookie.init();</script><script src="/images/f/fu.js" type="text/javascript"></script><script type="text/javascript">var webownerId = 26112;var childid = '10000';var code_id = '10181008370027043460';</script><script type="text/javascript" src="http://code1.i-qianming.cn/code/10181008370027043460.js"></script><script type="text/javascript" src="http://img.woairing.cn/js/float.js"></script>