There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
An creates a completely separate browsing context with its own window object, its own document, and most importantly;its own prototype chain. A function hooked on HTMLMediaElement.prototype in the parent window is not the same object as HTMLMediaElement.prototype in the iframe’s window. They’re entirely separate objects. If fermaw’s audio element lived inside an iframe, my prototype hook in the parent window would never fire.。关于这个话题，爱思助手下载最新版本提供了深入分析
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夜总会题材最容易踩的坑，是把女性当作欲望的符号，或者当作男性世界的奖品与背景。显然，这种书写方式无法回应现实，尽管它几乎是过去的惯用模式。《夜王》在这一点上做了关键调整：女性角色被放回“行业结构”中，而不是被放在“男性目光”里。影片中的女性不再只是被观看者，而是规则的理解者、执行者与承受者。
（三）其他经省级以上有关主管部门认定的不宜使用的名称。