在山西运城市平陆三湾大天鹅景区栖息的白天鹅。
At a national level, a survey by insurer Direct Line published in December suggested that nearly four million UK adults might be living in a home without any smoke alarm at all. In the US, an estimated 16% of households do not have a functioning smoke alarm.
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三、大力组织开展面向公众的社会科普活动