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7 Visibility is less than 200 meters. When fog lights, dipped beam lights, position lights and front and rear position lights are turned on, the maximum speed is 60 kilometers and the distance from the front car in the same lane is more than 100 meters.墨明在心里赞叹声：真是败家子。千钧一发之际，黎章赶了上来，伸手一带，将她扯到一旁，长剑立时崩断。The high loyalty of the program audience will be closer to the young audience in the future.　 夕阳西下，放牧归来的杨福躺在床上抽着烟，两眼直直的望着天棚，历历往事浮现在眼前。那是他服兵役的时候，回陕北探亲，家里给他说了个叫菊英的媳妇。他们恩恩爱爱地过了两个月。临走前，菊英叮嘱他明 年春天一定回来看看他们的孩子。谁知第二年春天，大雪封山他不能回去，第三年雪一开化，他就赶紧往家赶。此时，家乡正遭大旱，到家只见一把生锈的铁锁挂在门上。一打听，才知父亲已饿死，菊英拖着8个月的身孕去找他，至今未归。伤心的杨福到处寻找妻子毫无结果。后来，上级决定他退伍，无家可归的杨福主动要求在帕米尔高原为部队放牧。同志们都劝孤身一人的杨福再成个家，可姑娘看不上他偷偷地跑了。从此，他决心再不找女人。一天，杨福下山遇一位衣衫褴褛的年轻女人，是个哑巴。杨福买了几个馍送给她。谁知这女人竟偷偷跟他上了山。天快黑了也不好赶她下山。夜里，女人竟开口讲述了她的身世，求杨福收留她。杨福和这个叫改改的女人举行了婚礼。"八一"快到了，要按时把肉送到哨卡去，可杨福却发高烧病倒了。改改趁他睡熟之时，自己赶着牦牛去送肉......We know that IPTables acts according to rules. Let's talk about rules. Rules are actually predefined conditions for network administrators. Rules are generally defined as "if the packet header meets such conditions, this packet will be processed in this way". The rules are stored in the packet filtering table in kernel space, specifying the source address, destination address, transport protocol (such as TCP, UDP, ICMP), service type (such as HTTP, FTP, and SMTP), and so on. When packets match the rule, iptables processes these packets according to the methods defined by the rule, such as accept, reject and drop. The main task of configuring a firewall is to add, modify, and delete these rules.Return num1 + num2;