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Public TreeNode getParent () {The reason why the logic for creating an object is put into a separate class is that it can be used by multiple clients. And separates the creation and use of objects. However, this design also has many defects. First of all, SimpleFactory is a specific class, so we must program for the implementation, making the system lose its flexibility in this respect. Second, if we add new products, we have to modify the code in SimpleFactory, which violates the opening and closing principle. The above model is also called simple factory. He does not appear in GOF mode, it is more like a programming habit.Not only did I hear the voice, Almost half of the entire position 149 heard it, Then the position was bombed, The soldiers all took up their weapons and held the horses and bees in the air desperately to "hug the fire" (note: meaning to pull the trigger and fire), Even if there are some comrades who did not hear the cry of "fight", When they saw others firing, they followed suit. Those big wasps are abundant, Flying densely and bulky, So when we started shooting, The shooting rate is quite high, After the sound of the gun became one, it gradually became equal to the "buzzing" sound. No one can beat anyone, It feels strange that the two sounds are mixed together. Now that I think about it, It's like a rock band playing "heavy metal" (here "heavy metal" is a genre of rock music, Before the 1970s, This rock style is called 'hard rock', It was later renamed 'heavy metal', Of course, this is one of the more well-recognized explanations about the origin of the "heavy metal" genre of rock music. There are several other different explanations, As it is not relevant to this article, It will not be discussed in detail here), Then they gathered fire and shot for more than ten seconds. The left and right sides of the position were covered with the smashed bodies of this big wasp like rain. But then the bullets hit them more and more scattered in the air, finally forming a "circle", covering the whole position under, and then one by one dive to the ground, although they scattered, but in this way their distribution area is wider, and the spacing is widened, not as dense as before, plus flying fast,Richard是位酷爱冒险的美国年轻人，一天，他来到泰国度假，遇到法国女孩Franoise和其男友，三人成了朋友，不久Richard爱上Franoise。Richard偶然从旅馆获得一张神秘地图，遂跟Franoise和其男友共奋同找寻传说中的人间乐土。原来在那里已有一批先觉者组成社区，生活其中，他们为了享受原始的逍遥生活而跟在岛上种植大麻的当地农民订下协议，不能对外透露岛踪迹。1937年，热河人佟家儒（杨志刚饰）背井离乡在上海聂中丞中学教国文，养女囡囡成了残疾，本想再次南逃的他被迫留下。目睹侵略者残害同胞，他忍气吞声只求保住性命。学生欧阳（张家溢饰）为国效力，急需助手，佟家儒硬着头皮帮忙。欧阳牺牲，佟家儒暴露被日本特务东村盯上，他巧妙周旋完成任务同时摆脱了嫌疑。欧阳上司杨逍被抓，佟家儒将他救出。妻子栀子刚生下儿子希望，却因保护杨逍被杀。半年中四个参与杀害栀子的凶手均被佟家儒杀死且不露马脚。东村苦于没有证据，试图用残酷的刑具逼佟认罪。共产党人组织教师、学生游行，营救了佟家儒。三年后，佟家儒拿自己当诱饵，帮助国共两党的同志们联合除了日本特务基地。日寇投降，东村不甘失败绑架希望，逼佟家儒与其决斗。战友们制服东村，营救希望。东村大骂佟是懦夫，佟家儒告诉他：“对待侵略者，中国人都有一颗勇敢的心。