，北京市公安局一线执勤民警佩戴口罩上岗

&nbsp;<span class="img_descr">昨天，北京市公安局一线执勤民警佩戴口罩上岗。</span> <!-- publish_helper name='原始正文' p_id='1' t_id='1' d_id='26487523' f_id='3' --><!-- video_play_list_html <table id="video_play_list" border="1" cellspacing="0px" cellpadding="1px">
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        <td>北京民警戴口罩执勤</td>
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<p>　　本报讯(记者 安然)昨天，北京市公安局一线执勤民警佩戴口罩上岗。</p>
<p>　　昨天下午，记者发现，长安街一线的交警在漫天的沙尘中戴着统一的深蓝色口罩执勤。这种口罩与前段时间配发的一次性口罩完全不同，可有效防御沙尘。</p>
<p>　　据北京警方介绍，由于北京雾霾、沙尘天气频繁出现，对一线执勤民警身体健康造成危害，市公安局已为民警统一配发了口罩，要求在遇有雾霾等恶劣天气时，一线执勤警力可佩戴口罩上岗执勤。</p>