为什么不能长时间开内循环？
<!----><style type="text/css">html{font-size:375%}</style><link href="https://pic.app.yilongnews.com/static/publish/css/style.css?v=1605251010499" rel="stylesheet" position="1" data-qf-origin="/static/publish/css/style.css?v=1605251010499"><!-- 付费贴--> <div class="preview_article "> <!----> <p> 因为内循环是空气在车内封闭空间内的循环，车内的含氧量会不断下降，而且如果气缸中的汽油燃烧不完全，发动机未燃烧尽的一氧化碳也可能漏进车厢内，因此车内的空气质量会越来越差，甚至对人体产生危害。</p><p> </p><p> 因此应该开会儿内循环，再开一会儿外循环，让新鲜空气进入车厢。不能开着内循环在车内睡觉，也是这个道理。</p><p class="empty_paragraph"> </p><p class="qf_image big noneditable " style="position: relative;" contenteditable="false"><img src="https://pic.app.yilongnews.com/forum/20231129100635front1_0_167044_FlLkiKcCpbPKpYp3f3ongMitY0E4.jpg?watermark/1/image/aHR0cHM6Ly9waWMuYXBwLnlpbG9uZ25ld3MuY29tL2FkbWluX0ZrXzZPVWNxSkppbDBhaEdkN0FoOUR6bk9RNXEucG5n/dissolve/40/gravity/SouthEast" alt="" width="930" height="1482" data-qf-origin="forum/20231129100635front1_0_167044_FlLkiKcCpbPKpYp3f3ongMitY0E4.jpg?watermark/1/image/aHR0cHM6Ly9waWMuYXBwLnlpbG9uZ25ld3MuY29tL2FkbWluX0ZrXzZPVWNxSkppbDBhaEdkN0FoOUR6bk9RNXEucG5n/dissolve/40/gravity/SouthEast" data-qf-thumb="https://pic.app.yilongnews.com/forum/20231129100635front1_0_167044_FlLkiKcCpbPKpYp3f3ongMitY0E4.jpg?imageView2/2/w/1080|watermark/1/image/aHR0cHM6Ly9waWMuYXBwLnlpbG9uZ25ld3MuY29tL2FkbWluX0ZrXzZPVWNxSkppbDBhaEdkN0FoOUR6bk9RNXEucG5n/dissolve/40/gravity/SouthEast" data-qf-thumb-origin="forum/20231129100635front1_0_167044_FlLkiKcCpbPKpYp3f3ongMitY0E4.jpg?imageView2/2/w/1080|watermark/1/image/aHR0cHM6Ly9waWMuYXBwLnlpbG9uZ25ld3MuY29tL2FkbWluX0ZrXzZPVWNxSkppbDBhaEdkN0FoOUR6bk9RNXEucG5n/dissolve/40/gravity/SouthEast" /></p><p class="empty_paragraph" style="min-height: 25px;"> </p> <!----></div> 长知识了啊！！！ 谢谢分享！！！
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