输出：5（需排序 [6,4,8,10,9]）
The tests used in standards for evaluating smoke alarms were developed back in the 1980s. However, despite changes in building materials since then, smoke alarms remain reliable, says Chagger: "They still respond to all the main fires we get today."
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。业内人士推荐safew官方版本下载作为进阶阅读
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04，更多细节参见下载安装 谷歌浏览器 开启极速安全的 上网之旅。
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