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Now let's look at the PLA cigarette oil filter, which is especially like plastic paper. This thing does look like plastic, but it is actually PLA, or polylactic acid. Someone once misunderstood that this thing was plastic, and then wondered how harmful it would be if the plastic was heated during smoking. In fact, this is a complete misunderstanding, because it is not plastic at all.General principle: Open Close Principle)抗战爆发后，中国军队坚持持久抗战，粉碎了日军“三个月灭亡中国”的妄想，深陷战争泥潭、耗尽国力和资源后，日军大本营对中国战区的日军提出以战养战、自给自足的无奈要求。东北日军按大本营的要求，在月亮岛秘密兴建劳工营，抓捕3000余百姓和战俘充当劳工。在日军狱方惨无人道的监管下，3000名劳工在地狱里生死挣扎。面对死亡，劳工一次次自发越狱，都以失败告终。以刘墨扬、陆刚为核心的越狱组织者意识到必须组织起全体劳工，统一行动。一个以“章鱼”为名的越狱计划在悄悄展开。面对狱方宣称如同铁桶一样滴水不漏的监管，刘墨扬和陆刚等不懈努力，终于找到铁桶中的一个个细微漏洞和薄弱环节，而八路军女战俘邱天红为越狱行动而英勇牺牲的壮举，将一盘散沙的劳工迅速凝聚，冲破监防，成功越狱，奏响了一曲荡气回肠的生命交响。远远看了一会，又爬了回来。赵文华很喜欢这样的景象。　　顾菲在下岗后不停为生计奔波……