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The form (ring and branch) and pipe diameter of municipal water supply network, the number and pipe diameter of water inlet pipes for municipal water supply to buildings (structures), the location and capacity of fire-fighting pools, the location and capacity of roof water tanks, other water source forms and water supply, the location and number of fire-fighting pump rooms, and the layout of fire-fighting water supply system.Starting from the Music Field//114As the name implies, iterator pattern is to access objects in an aggregation sequentially. Generally speaking, it is very common in collections. If you are familiar with collection classes, it will be very easy to understand this pattern. This sentence contains two meanings: one is the object that needs to be traversed, that is, the aggregated object, and the other is the iterator object, which is used to traverse the aggregated object. Let's look at the diagram:……………………………………………………………………………………韩信的大军已经追过来了，来到淮水岸边的时候，等待他的不是处于绝境之中的项羽和楚军，而是数千气势汹汹的骑兵。生活在夏威夷的 Sean（张孝全 饰）单纯善良，然而前女友的出轨事件，令他对爱情产生了怀疑，不敢再轻易相信别人。这时，他的生命中出现了一位古灵精怪的女孩 Emily（周冬雨 饰），令他重新感受到爱情的美好。好景不长，一次意外令 Emily 的真实身份曝光，原来她竟是「指甲刀人魔」，即是只能以指甲刀为食的特殊人类，这对 Sean 来说无异于天方夜谭。在无法验证真假的情况下，Sean 要不要相信 Emily？恋人之间的信任到底能做到何种程度？ Sean 面临了比上次恋爱更加艰难的抉择。　　小镇上有个军阀，名叫卡洛斯·桑坦纳（丹尼·特雷乔），他残暴不仁危害百姓。拉里他们三人就误打误撞以为卡洛斯就是他们的伊拉This paper summarizes three attack technologies against artificial intelligence systems-antagonistic input, data poisoning attack and model stealing technology. Specific examples and defense strategies are added to the discussion of each attack, aiming at providing an overview for all those who are interested in using artificial intelligence for anti-abuse defense.