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Mental Representation Helps Efficient Learning//105Add a rule at the end of the specified chain of the specified table. The-A option means that the rule is added at the end of the corresponding chain. When the-t option is omitted, it means that the rule in the filter table is operated by default.“九一八”前夕，地下党人宋烟桥接受中央特科的一项神秘任务－寻找抗日英雄颜红光。没想到任务的开始就面临着被叛徒出卖，好友牺牲，与上级失联等一系列问题，为了查明真相，宋烟桥设计入狱，勇斗满铁警察署，肃清了叛徒，重建沈阳地下组织。 “九一八”爆发后，宋烟桥在哈尔滨找到颜红光，并暗中帮助，颜红光牺牲后他扛起这面英雄的旗帜，扮演着“颜红光”继续战斗。他改变城市斗争的形态，开始建立城市游击队。他不愿让任何人受到牵连，面对战友的表白他拒绝了。在极端艰难的条件下，他带领着游击队和隐秘战线，屡建奇功。 随着整个东北抗战局势的恶化，他也走向了自己命运的终点。他有过选择，可以越界苏联偷生。但他决定留下来，扛着“颜红光”这面旗帜战斗到最后。虽不堪，历时大半年，可这一天倭乱总算平了。This time, the handwriting of the interface is undoubtedly one of the most striking events in the industry this year. Many people's circle of friends has been swept by the incident. In the media group, the winners of the award, such as interface reporter Liu Xiangnan, have received congratulations and it is estimated that many red envelopes have also been given.Analysis: JS floating-point number operation cannot accurately express decimals. When will it be accurate? I don't know (-).