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A) Use simpler object-oriented languages such as Java, C #. GoF's [design pattern] is essentially an object-oriented design pattern. [GoF · 1.1] mentioned that "the choice of programming language is very important, which will affect the starting point of people's understanding of the problem". From the perspective of learning design patterns, Java and C # are easier than C + +. Such as Java interfaces, can more effectively show the intention of design patterns.　　影片的导演丁晟曾执导《硬汉》系列、《大兵小将》、《警察故事2013》，凭借力量感十足的硬派美学风格，取得了商业上的成功，其作品国内总票房过七亿，不仅奠定了在华语警匪类型片的领衔地位，也不断丰富其电影的形态和内涵。留美归来的商业高材生果段，最近从贱男变为了一枚失意贱男，在他自己的创业的餐厅果氏私房菜倒闭的同天，已经甩了他六次的年上女友又毫不留情的甩了他第七次。事业爱情皆失意的果段同时发现自己所有的储蓄已经砸进了这间loft餐厅的租金。于是他找来非著名网络VJ哈雷与IQ高EQ低的网络极客伊飞与他合租。邻居的女汉子童歌在果氏私房菜对面开了一家画廊，不时去果段家蹭吃蹭喝，有时候也寻求帮助，比如吓走长得像黑社会的第231号相亲对象。I nodded at this passage, Understand that what Zhang Xiaobo said is indeed reasonable, It is not a lie, Here I think it is necessary to give you one thing about popular science. So we have to say something digressive: The result of a real bullet hitting a petrol tank is not the same as that shown in most movies. One shot can explode the petrol tank, But this is not the case, Although a pure metal projectile will rub against the air at a speed of hundreds of meters per second to generate equivalent heat, And will produce sparks after hitting the metal oil drum, But none of this is enough to ignite petrol, Especially for gasoline with a large total amount, to ignite gasoline, please remember one thing-open flame must be used. In addition, gasoline is a flammable item, but it is not an explosive item in the true sense. Only after reaching a certain total amount can explosion be caused. If the total amount is insufficient, it can only cause combustion without explosion.林聪听他念念有词，又见兔子十分可爱，不禁起了童心和恻隐之意，竟细声劝慰兔子道：小兔子，赶快跑。Logically speaking. Firewalls can be roughly divided into host firewalls and network firewalls.